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BEGIN:VEVENT
SUMMARY:Nil Şahin (Bilkent University)
DTSTART:20260219T124000Z
DTEND:20260219T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/1
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/1/">Numerical Semigroups: From the Frobenius Coin Problem to Hilbert 
 Functions</a>\nby Nil Şahin (Bilkent University) as part of METU Mathemat
 ics General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Math
 ematics Department.\n\nAbstract\nThe study of numerical semigroups finds i
 ts classical roots in the "Frobenius Coin Problem"\, famously popularized 
 by J.J. Sylvester in the late 19th century. Sylvester’s initial question
  "determining the largest integer that cannot be expressed as a non-negati
 ve integer linear combination of a given set of coprime integers" laid the
  groundwork for what is now a rich intersection of combinatorics and commu
 tative algebra.\n\nThrough the construction of semigroup rings\, these com
 binatorial objects provide a natural framework for studying the geometric 
 and algebraic properties of monomial curves. In particular\, the link betw
 een the numerical semigroup and the Hilbert function of its associated gra
 ded ring has become a focal point of recent research. Characterizing numer
 ical functions that might be Hilbert functions of one-dimensional Cohen-Ma
 caulay local rings is an open question.\n\nThere is a conjecture by Judith
  Sally stating that the "Hilbert function of a one-dimensional Cohen-Macau
 lay local ring with small enough embedding dimension is non-decreasing". I
 n this talk\, we will focus on 4-generated symmetric and pseudo-symmetric 
 monomial curves. We will demonstrate that 4-generated pseudo-symmetric mon
 omial curves satisfy Sally’s conjecture.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Haydar Göral (IZTECH)
DTSTART:20260226T124000Z
DTEND:20260226T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/2
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/2/">Counting Arithmetic Progressions in Finite Rings</a>\nby Haydar G
 öral (IZTECH) as part of METU Mathematics General Seminar\n\n\nAbstract\n
 Finding arbitrarily long arithmetic progressions in certain subsets of the
  integers has become one of the most important problems in mathematics ove
 r the last century. One of the most famous results in this area was proved
  by Szemerédi in 1975\, and it states that every subset of the positive i
 ntegers with positive upper density contains arbitrarily long arithmetic p
 rogression. In this talk\, we will discuss some results concerning the num
 ber of 3-term arithmetic progressions in certain subsets of finite rings u
 sing finite Fourier analysis.\n\nInterested participants may send an email
  to Oğuz Şavk to receive the Google Meet link.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Deniz Yılmaz (Bilkent University)
DTSTART:20260305T124000Z
DTEND:20260305T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/3
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/3/">A Categorical Perspective on Representation Theory</a>\nby Deniz 
 Yılmaz (Bilkent University) as part of METU Mathematics General Seminar\n
 \nLecture held in Gündüz İkeda Seminar Room\, Mathematics Department.\n
 \nAbstract\nGroups arise naturally in the study of symmetry\, and represen
 tation theory studies\ngroups through linear algebra. In this talk\, we wi
 ll introduce a categorical framework in\nwhich finite groups appear as obj
 ects and the morphisms between them encode natural\noperations from repres
 entation theory. After introducing the classical theory of bisets and\nbis
 et functors\, we will discuss two related refinements: diagonal $p$-permut
 ation functors\,\nobtained from suitable bimodules\, and $p$-bifree biset 
 functors\, obtained by restricting to a\ndistinguished class of bisets. Th
 ese constructions connect naturally with current questions\nin modular rep
 resentation theory\, especially local-global conjectures.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cihan Bahran (Bilkent University)
DTSTART:20260312T124000Z
DTEND:20260312T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/4
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/4/">Character Polynomials for Symmetric Groups and FI-modules</a>\nby
  Cihan Bahran (Bilkent University) as part of METU Mathematics General Sem
 inar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathematics Departm
 ent.\n\nAbstract\nFor every positive integer $r$\, the number of cycles of
  length $r$ in the cycle decomposition of a permutation is a class functio
 n $X_r$ which is simultaneously defined on every symmetric group. A polyno
 mial in terms of $X_r$'s is called a character polynomial\, describing a s
 equence of (virtual) $S_n$ representations for every $n$. In this talk I w
 ill discuss how such sequences arise in particular examples of interest an
 d time permitting explain how the theory of FI-modules provides a general 
 framework for their occurrence.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Holiday (No Seminar)
DTSTART:20260319T124000Z
DTEND:20260319T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/5
DESCRIPTION:by Holiday (No Seminar) as part of METU Mathematics General Se
 minar\n\nLecture held in Ikeda Seminar Room\, Mathematics Department.\nAbs
 tract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kâzım İlhan İkeda (Boğaziçi University & Feza Gürsey Center
  for Physics and Mathematics)
DTSTART:20260326T124000Z
DTEND:20260326T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/6
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/6/">A Statistical Approach to the Global Artin Reciprocity Map: An Un
 conditional Non-abelian Global Class Field Theory</a>\nby Kâzım İlhan 
 İkeda (Boğaziçi University & Feza Gürsey Center for Physics and Mathem
 atics) as part of METU Mathematics General Seminar\n\nLecture held in Gün
 düz İkeda Seminar Room\, Mathematics Department.\n\nAbstract\nIn this ta
 lk\, borrowing tools from statistics\, we shall first construct\, followin
 g T. Ono\, an unconditional non-Abelian generalization of the global Artin
  reciprocity map for any finite Galois extension $\\mathbf{E}$ of a global
  field $\\mathbf{F}$. This theory has deep connections with the Langlands 
 reciprocity principle\, while the latter is still conjectural. In the seco
 nd part of the talk\, we plan to discuss some properties of the Ono recipr
 ocity map for $\\mathbf{E}/\\mathbf{F}$\, and construct the (absolute) Ono
  reciprocity map for $\\mathbf{F}^{sep}/\\mathbf{F}$. Finally\, we plan to
  give a description of the maximal unramified extension of $\\mathbf{F}$ i
 nside $\\mathbf{F}^{sep}$\, which is closely related with the Golod-Shafar
 evich Theory. This is joint work with my PhD student Serkan Kızılavuz (E
 skişehir Technical University).\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tülin Altunöz (Başkent University)
DTSTART:20260402T124000Z
DTEND:20260402T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/7
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/7/">Lefschetz Fibrations with Arbitrary Slope</a>\nby Tülin Altunöz
  (Başkent University) as part of METU Mathematics General Seminar\n\nLect
 ure held in Gündüz İkeda Seminar Room\, Mathematics Department.\n\nAbst
 ract\nIn joint work with Adalet Çengel\, we proved that for any real numb
 er $r \\in (2\, 8)$\, there exists a genus-$g$ Lefschetz fibration over th
 e two-sphere with large enough genus-$g$ having the slope arbitrarily clos
 e to $r$. In this talk\, I am planning to explain this work.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Todor Tsankov (UCB Lyon 1)
DTSTART:20260409T124000Z
DTEND:20260409T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/8
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/8/">Comeager Isomorphism Classes in Zero-dimensional Dynamics</a>\nby
  Todor Tsankov (UCB Lyon 1) as part of METU Mathematics General Seminar\n\
 nLecture held in Zoom (Meeting ID: 870 2331 0873).\n\nAbstract\nIt is ofte
 n possible to parametrize a given class of dynamical systems by elements o
 f a Polish space and then it becomes natural to ask what properties hold "
 generically"\, i.e.\, for a comeager set of systems. The most extreme situ
 ation is when there is a single comeager isomorphism class: that is\, the 
 generic properties are captured by a single system. I will survey what is 
 known about this problem in zero-dimensional topological dynamics\, that i
 s\, countable group actions on the Cantor space. I will focus on some rece
 nt joint work with Michal Doucha and Julien Melleray concerning minimal sy
 stems.\n\nFor the Zoom meeting passcode\, please contact the co-organizer\
 , Oğuz Şavk.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Holiday (No Seminar)
DTSTART:20260423T124000Z
DTEND:20260423T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/9
DESCRIPTION:by Holiday (No Seminar) as part of METU Mathematics General Se
 minar\n\nLecture held in Ikeda Seminar Room\, Mathematics Department.\nAbs
 tract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ödül Tetik (University of Vienna)
DTSTART:20260430T124000Z
DTEND:20260430T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/10
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/10/">On a conjecture of Ayala–Francis–Rozenblyum</a>\nby Ödül T
 etik (University of Vienna) as part of METU Mathematics General Seminar\n\
 n\nAbstract\nEvery finite homotopy type can be realised by a smooth manifo
 ld. I will present some finite stratified homotopy types which cannot be r
 ealised by conically smooth manifolds\, disproving a 2015 conjecture of Ay
 ala\, Francis and Rozenblyum.\n\nThe seminar will be streamed on Zoom.  Fo
 r the meeting information\, please contact the co-organizer\, Oğuz Şavk.
 \n
LOCATION:https://master.researchseminars.org/talk/METU_Math/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:András Stipsicz (Alfréd Rényi Institute of Mathematics)
DTSTART:20260508T124000Z
DTEND:20260508T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/11
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/11/">Arf Lectures 2026: Exotica in Dimension Four</a>\nby András Sti
 psicz (Alfréd Rényi Institute of Mathematics) as part of METU Mathematic
 s General Seminar\n\nLecture held in Ikeda Seminar Room\, Mathematics Depa
 rtment.\n\nAbstract\nFour-dimensional spaces behave very differently than 
 spaces  of any other dimension. This ‘exotic’ behavior was unrevealed 
 by work of Freedman and  Donaldson in the early 80’s\, and led to severa
 l surprising and interesting discoveries since then. In the lecture we wil
 l concentrate on exotica on ‘definite’  four-manifolds\, and indicate 
 their relevance in the ’smooth  four-dimensional Poincaré conjecture’
  the last open question in this  circle of problems regarding the topology
  of spheres.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bülent Tosun (University of Alabama)
DTSTART:20260521T124000Z
DTEND:20260521T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/12
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/12/">Convexity and embedding problems for 3-manifolds</a>\nby Bülent
  Tosun (University of Alabama) as part of METU Mathematics General Seminar
 \n\nLecture held in Ikeda Seminar Room\, Mathematics Department.\n\nAbstra
 ct\nGiven a closed\, orientable $3$-manifold\, it is of great interest but
  often a difficult (and largely open) problem to determine whether the $3$
 -manifold smoothly embeds in $4$-dimensional Euclidean space. On the other
  hand\, under additional geometric considerations coming from symplectic t
 opology\, such as hypersurfaces of contact type\, the problem becomes trac
 table and in certain cases a uniform answer is possible. In this talk\, I 
 will review these concepts and recent results and explain how they relate 
 to the various complex analytic notions of convexity such as pseudoconvexi
 ty and rational convexity. I will also report on recent work in progress t
 hat extends our results to symplectic $4$-manifolds other than the Euclide
 an space\, such as rational surfaces.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:M. Levent Doğan (Ludwig-Maximilians-Universität München)
DTSTART:20260514T124000Z
DTEND:20260514T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/13
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/13/">A Minimax Theorem for Convex Optimization on Moment Polytopes</a
 >\nby M. Levent Doğan (Ludwig-Maximilians-Universität München) as part 
 of METU Mathematics General Seminar\n\nLecture held in Gündüz İkeda Sem
 inar Room\, Mathematics Department.\n\nAbstract\nStrassen's asymptotic spe
 ctrum offers a framework for analyzing the complexity of tensors. It has f
 ound applications in diverse areas\, from computer science to additive com
 binatorics and quantum information. A long-standing open problem\, dating 
 back to 1991\, asks whether Strassen's support functionals are universal s
 pectral points\, that is\, points in the asymptotic spectrum of tensors.\n
 \nIn this talk\, we answer this question in the affirmative by proving tha
 t the support functionals coincide with the quantum functionals - universa
 l spectral points that are defined via entropy optimization on entanglemen
 t polytopes. We obtain this result as a special case of a general minimax 
 formula for convex optimization on entanglement polytopes (and other momen
 t polytopes) that has further applications to other tensor parameters\, in
 cluding the asymptotic slice rank. Our proof is based on a recent Fenchel-
 type duality theorem on Hadamard manifolds due to Hirai.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:András Stipsicz (Alfréd Rényi Institute of Mathematics)
DTSTART:20260509T090000Z
DTEND:20260509T095000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/14
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/14/">Special Seminar: Exotic Four-manifolds with Cyclic Fundamental G
 roup</a>\nby András Stipsicz (Alfréd Rényi Institute of Mathematics) as
  part of METU Mathematics General Seminar\n\nLecture held in Gündüz İke
 da Seminar Room\, Mathematics Department.\n\nAbstract\nWe will show method
 s for constructing exotic four-manifolds with\nfundamental group $\\mathbb
 {Z}_2$\, and some extensions to further cases of non-trivial\nfundamental 
 groups. We also plan to point out several open questions along\nthe way.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Holiday (No Seminar)
DTSTART:20260528T124000Z
DTEND:20260528T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/15
DESCRIPTION:by Holiday (No Seminar) as part of METU Mathematics General Se
 minar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathematics Depart
 ment.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Erman Işık (Bilkent University)
DTSTART:20260416T124000Z
DTEND:20260416T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/16
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/16/">The Growth of Tate-Shafarevich Groups of $p$-supersingular Ellip
 tic Curves over Anticyclotomic $\\mathbb{Z}_p$-extensions at Inert Primes<
 /a>\nby Erman Işık (Bilkent University) as part of METU Mathematics Gene
 ral Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathematics 
 Department.\n\nAbstract\nIn this talk\, we will discuss the asymptotic gro
 wth of both the Mordell-Weil ranks and the Tate–Shafarevich groups for a
 n elliptic curve $E$ defined over the rational numbers\, focusing on its b
 ehaviour along the anticyclotomic $\\mathbb{Z}_p$-extension of an imaginar
 y quadratic $K$. Here\, $p$ is a prime at which $E$ has good supersingular
  reduction and is inert in $K$. After reviewing the definition and key pro
 perties of the plus and minus Selmer groups in Iwasawa theory\, we explain
  how these objects can be used to extract arithmetic information about the
  elliptic curve $E$.\n\nThe seminar will be also streamed on Zoom.  For th
 e meeting information\, please contact the co-organizer\, Oğuz Şavk.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Özlem Ejder (Koç University)
DTSTART:20260604T124000Z
DTEND:20260604T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/17
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/17/">Settled elements in arboreal Galois Groups</a>\nby Özlem Ejder 
 (Koç University) as part of METU Mathematics General Seminar\n\nLecture h
 eld in Gündüz İkeda Seminar Room\, Mathematics Department.\n\nAbstract\
 nOver the rational numbers\, it is conjectured that the number of irreduci
 ble factors of the iterates of a polynomial is eventually constant. How do
  the iterates of a polynomial behave over finite fields? This brings us to
  the notion of settledness.\n\nIn this talk\, we will discuss two settled 
 objects: a settled polynomial and a settled tree automorphism. The connect
 ion between them is given via Frobenius elements acting in the Galois grou
 ps of polynomial iterates. These groups\, called arboreal Galois groups\, 
 are naturally subgroups of the automorphism group of a regular binary tree
  formed by the iterated preimages of 0 under a polynomial.\n\nWe will expl
 ore how the dynamics and geometry of a polynomial shape the arithmetic and
  group-theoretic properties of these arboreal Galois groups and discuss re
 cent progress on a conjecture of Boston and Jones concerning settledness f
 or quadratic polynomials.\n\nThe seminar will be in-person.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bayram Tekin (Bilkent University)
DTSTART:20261001T130000Z
DTEND:20261001T135000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/18
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/18/">Where does the energy live on a manifold? Some recent results on
  conserved quantities in spacetime</a>\nby Bayram Tekin (Bilkent Universit
 y) as part of METU Mathematics General Seminar\n\nLecture held in Gündüz
  İkeda Seminar Room\, Mathematics Department.\n\nAbstract\nGeneral Relati
 vity models gravitation as a 3+1-dimensional pseudo-Riemannian manifold.\n
 This connects concepts like mass\, momentum\, and angular momentum to diff
 erential geometric invariants of the underlying manifold. We will discuss 
 our recent work on this\, where we express these quantities in terms of th
 e Riemann tensor rather than the first derivative of the metric tensor. Th
 e relevant details can be found in: https://arxiv.org/abs/2607.25646\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gökhan Benli (METU)
DTSTART:20261008T124000Z
DTEND:20261008T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/19
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/19/">Topological full groups</a>\nby Gökhan Benli (METU) as part of 
 METU Mathematics General Seminar\n\nLecture held in Gündüz İkeda Semina
 r Room\, Mathematics Department.\n\nAbstract\nTopological full groups orig
 inally arose in the study of Cantor dynamical systems as invariants of con
 jugacy. Over the past two decades\, they have evolved into a rich source o
 f counterexamples and novel phenomena in geometric group theory. Roughly s
 peaking\, given a group acting by homeomorphisms on a zero-dimensional spa
 ce (such as the Cantor set)\, its topological full group consists of all h
 omeomorphisms that locally look like elements of the acting group. These g
 roups yielded the first known examples of infinite\, finitely generated\, 
 amenable simple groups  and established deep bridges connecting topologica
 l dynamics and group theory.\n\nThis talk will serve as a self-contained i
 ntroduction to topological full groups. After providing historical backgro
 und we will explore the dynamical machinery connecting Cantor systems to t
 hese groups. We  will also present recent results regarding  finite presen
 tability and free subgroups of topological full groups.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aslı Pekcan Yıldız (Hacettepe University)
DTSTART:20261015T124000Z
DTEND:20261015T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/20
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/20/">Integrable PDEs with nonlocalities</a>\nby Aslı Pekcan Yıldız
  (Hacettepe University) as part of METU Mathematics General Seminar\n\nLec
 ture held in Gündüz İkeda Seminar Room\, Mathematics Department.\n\nAbs
 tract\nThis talk will first introduce integrable differential equations an
 d the concept of solitons. The origin of Ablowitz–Musslimani-type nonloc
 al reductions and their relationship with classical integrable systems wil
 l then be considered. Using the nonlinear Schrödinger system (NLS) as an 
 illustrative example\, it will be shown how nonlocal reductions are obtain
 ed. Hirota's bilinear method will subsequently be introduced\, and its rol
 e in deriving soliton solutions of nonlocal integrable equations will be e
 xplained. Soliton solutions obtained for the NLS system and its nonlocal r
 eductions\, together with recent studies on shifted nonlocal reductions\, 
 will be presented. It will also be demonstrated that\, for real shift para
 meters\, shifted nonlocal equations can be transformed into their unshifte
 d counterparts through suitable translations of the independent variables.
  Finally\, possible directions for future research will be discussed.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Burak Kaya (METU)
DTSTART:20261022T124000Z
DTEND:20261022T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/21
DESCRIPTION:Title: <a href="https://master.researchseminars.org/talk/METU_
 Math/21/">Topological Ramsey numbers of countable ordinals</a>\nby Burak K
 aya (METU) as part of METU Mathematics General Seminar\n\nLecture held in 
 Gündüz İkeda Seminar Room\, Mathematics Department.\n\nAbstract\nIn bro
 ad terms\, Ramsey theory can be described as the study of when certain "pa
 tterns" must appear in sufficiently large combinatorial structures. Ramsey
  theory of ordinals and cardinals has been an active research area since t
 he introduction of partition calculus by Erd\\H{o}s and Rado in 1950's. Th
 ese studies were later generalized to topological spaces by Baumgartner. I
 n recent years\, Caicedo and Hilton initiated an investigation of closed a
 nd topological partition relations on countable ordinals and this investig
 ation has attracted some attention.\n\nIn the first part of the talk\, we 
 will briefly review some old results in partition calculus of countable or
 dinals and their topological counterparts. In the second part of the talk\
 , we will present some new bounds for the closed Ramsey numbers $R^{cl}(\\
 alpha\,3)$ with $\\alpha<\\omega^2$.\n\nThe results in the second half of 
 the talk are from joint work with Duman\, Gönül\, Saxena and Tamer. This
  work is supported by the Scientific and Technological Research Council of
  Türkiye (TÜBİTAK) under the Project Number 124F353.\n\nThe talk will b
 e self-contained in the sense that no prior knowledge on Ramsey theory or 
 set theory is necessary.\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Holiday (No Seminar)
DTSTART:20261029T124000Z
DTEND:20261029T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/22
DESCRIPTION:by Holiday (No Seminar) as part of METU Mathematics General Se
 minar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathematics Depart
 ment.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Özge Ülkem (Academia Sinica)
DTSTART:20261105T124000Z
DTEND:20261105T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/23
DESCRIPTION:by Özge Ülkem (Academia Sinica) as part of METU Mathematics 
 General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathemat
 ics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:İlkan Yıldırım (Mikrogroup)
DTSTART:20261112T124000Z
DTEND:20261112T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/24
DESCRIPTION:by İlkan Yıldırım (Mikrogroup) as part of METU Mathematics
  General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathema
 tics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jean-Yves Welschinger (UCB Lyon 1)
DTSTART:20261119T124000Z
DTEND:20261119T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/25
DESCRIPTION:by Jean-Yves Welschinger (UCB Lyon 1) as part of METU Mathemat
 ics General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Math
 ematics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Konstantinos Maronikolakis (Bilkent University)
DTSTART:20261126T124000Z
DTEND:20261126T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/26
DESCRIPTION:by Konstantinos Maronikolakis (Bilkent University) as part of 
 METU Mathematics General Seminar\n\nLecture held in Gündüz İkeda Semina
 r Room\, Mathematics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elif Medetoğulları (TED University)
DTSTART:20261203T124000Z
DTEND:20261203T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/27
DESCRIPTION:by Elif Medetoğulları (TED University) as part of METU Mathe
 matics General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, M
 athematics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Enis Kaya (Bilkent University)
DTSTART:20261210T124000Z
DTEND:20261210T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/28
DESCRIPTION:by Enis Kaya (Bilkent University) as part of METU Mathematics 
 General Seminar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathemat
 ics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aristotelis Panagiotopoulos (University of Vienna and University o
 f Crete)
DTSTART:20261217T124000Z
DTEND:20261217T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/29
DESCRIPTION:by Aristotelis Panagiotopoulos (University of Vienna and Unive
 rsity of Crete) as part of METU Mathematics General Seminar\n\nLecture hel
 d in Gündüz İkeda Seminar Room\, Mathematics Department.\nAbstract: TBA
 \n
LOCATION:https://master.researchseminars.org/talk/METU_Math/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eda Kırımlı (University of Birmingham)
DTSTART:20261224T124000Z
DTEND:20261224T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/30
DESCRIPTION:by Eda Kırımlı (University of Birmingham) as part of METU M
 athematics General Seminar\n\nLecture held in Gündüz İkeda Seminar Room
 \, Mathematics Department.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Holiday (No Seminar)
DTSTART:20261231T124000Z
DTEND:20261231T133000Z
DTSTAMP:20261018T190817Z
UID:METU_Math/31
DESCRIPTION:by Holiday (No Seminar) as part of METU Mathematics General Se
 minar\n\nLecture held in Gündüz İkeda Seminar Room\, Mathematics Depart
 ment.\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/METU_Math/31/
END:VEVENT
END:VCALENDAR