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SUMMARY:Roland Bittleston (Perimeter Institute)
DTSTART;VALUE=DATE-TIME:20230615T003000Z
DTEND;VALUE=DATE-TIME:20230615T013000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/1
DESCRIPTION:Title: Overview of Classical and Quantum Integrability in Four Dimensions
\nby Roland Bittleston (Perimeter Institute) as part of Nagoya Math-Phys S
eminar\n\n\nAbstract\nThis talk will review recent progress by a number of
groups in understanding classical and quantum integrable models in four d
imensions. This has been achieved by exploiting twistor methods. After a s
hort introduction to twistors\, I will introduce some of the simplest exam
ples of 4d theories with twistor uplifts: self-dual Yang-Mills and the 4d
WZW model. I then plan to touch on a number of topics including: the conne
ction to 4d Chern-Simons theory\, quantization of these theories on twisto
r space\, their hidden symmetry algebras (also known as celestial chiral a
lgebras) and finally the twistor string.\n
LOCATION:https://master.researchseminars.org/talk/nmps/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Roland Bittleston (Perimeter Institute)
DTSTART;VALUE=DATE-TIME:20230616T003000Z
DTEND;VALUE=DATE-TIME:20230616T013000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/2
DESCRIPTION:Title: Classical and Quantum Integrability in Self-Dual Gravity\nby Rolan
d Bittleston (Perimeter Institute) as part of Nagoya Math-Phys Seminar\n\n
\nAbstract\nThis talk will concentrate on an intriguing example of a 4d in
tegrable theory: self-dual gravity. I will explain how its classical integ
rability is realised in the existence of an infinite dimensional hidden sy
mmetry algebra\, or celestial chiral algebra. This governs the universal h
olomorphic surface defect which can couple to the twistor uplift of self-d
ual gravity. At the quantum level\, this twistor uplift is anomalous and t
he quantum corrected chiral algebra fails to be associative. I will presen
t a number of methods of cancelling the anomaly\, leading to consistent qu
antum corrected hidden symmetry algebras. Finally\, I will explore how thi
s story is modified on one of the simplest non-trivial examples of a self-
dual Ricci flat background: the Eguchi-Hanson gravitational instanton.\n\n
This talk is based on collaborations with Simon Heuveline\, Atul Sharma an
d David Skinner.\n
LOCATION:https://master.researchseminars.org/talk/nmps/2/
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SUMMARY:Atul Sharma (Harvard University)
DTSTART;VALUE=DATE-TIME:20230721T003000Z
DTEND;VALUE=DATE-TIME:20230721T013000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/3
DESCRIPTION:Title: Burns holography\nby Atul Sharma (Harvard University) as part of N
agoya Math-Phys Seminar\n\n\nAbstract\nI will describe a top-down example
of celestial holography\, based on recent work with Costello and Paquette.
Our duality relates certain models of self-dual gauge theory and conforma
l gravity\, placed on an asymptotically flat four-dimensional spacetime ca
lled Burns space\, to a two-dimensional chiral algebra living on D1 branes
in a topological string theory on twistor space.\n
LOCATION:https://master.researchseminars.org/talk/nmps/3/
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BEGIN:VEVENT
SUMMARY:Frank Nijhoff (University of Leeds)
DTSTART;VALUE=DATE-TIME:20230914T080000Z
DTEND;VALUE=DATE-TIME:20230914T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/4
DESCRIPTION:Title: Lagrangian multiforms\, the Darboux-KP system and Chern-Simons theory
in infinite-dimensional space\nby Frank Nijhoff (University of Leeds)
as part of Nagoya Math-Phys Seminar\n\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/nmps/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francis Howard (Benin University)
DTSTART;VALUE=DATE-TIME:20231019T080000Z
DTEND;VALUE=DATE-TIME:20231019T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/5
DESCRIPTION:Title: Particles and p－Adic Integrals of Spin(1/2): Spin Lie Group\, R(ρ\,
q)－gamma and R(ρ\, q)－ beta Functions\, Ghost and Applications\n
by Francis Howard (Benin University) as part of Nagoya Math-Phys Seminar\n
\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/nmps/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Artur Sergyeyev (Opava)
DTSTART;VALUE=DATE-TIME:20231109T080000Z
DTEND;VALUE=DATE-TIME:20231109T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/6
DESCRIPTION:Title: Infinitely many new (3+1)-dimensional integrable systems from contact
geometry\nby Artur Sergyeyev (Opava) as part of Nagoya Math-Phys Semin
ar\n\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/nmps/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Meer Ashwinkumar (University of Bern)
DTSTART;VALUE=DATE-TIME:20231221T080000Z
DTEND;VALUE=DATE-TIME:20231221T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/7
DESCRIPTION:Title: Dualities and Discretizations of Integrable Quantum Field Theories fro
m 4d Chern-Simons Theory\nby Meer Ashwinkumar (University of Bern) as
part of Nagoya Math-Phys Seminar\n\nAbstract: TBA\n
LOCATION:https://master.researchseminars.org/talk/nmps/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuri Suris
DTSTART;VALUE=DATE-TIME:20240509T080000Z
DTEND;VALUE=DATE-TIME:20240509T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/8
DESCRIPTION:Title: E. Noether's variational symmetries and pluri-Lagrangian systems\n
by Yuri Suris as part of Nagoya Math-Phys Seminar\n\n\nAbstract\nWe analyz
e the relation of the notion of a pluri-Lagrangian system\, which recently
emerged in the theory\nof integrable systems\, to the classical notion of
variational symmetry\, due to E. Noether. For finite-dimensional (classic
al mechanical) systems we show that\, for any Lagrangian system with m com
muting variational symmetries\, one can construct a pluri-Lagrangian 1-for
m in the (m+1)-dimensional time\,\nwhose multi-time Euler-Lagrange equatio
ns coincide with the original system supplied with m commuting\nevolutiona
ry flows corresponding to the variational symmetries. For two-dimensional
hierarchies of\nLagrangian PDEs\, we show that if the flow of each PDE is
a variational symmetry of all others\, then there exists a pluri-Lagrangia
n 2-form for the hierarchy. The corresponding multi-time Euler–Lagrange
equations coincide with the original system supplied with commuting evolut
ionary flows induced by the variational symmetries.\n
LOCATION:https://master.researchseminars.org/talk/nmps/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Junya Yagi (Tsinghua)
DTSTART;VALUE=DATE-TIME:20240913T080000Z
DTEND;VALUE=DATE-TIME:20240913T090000Z
DTSTAMP;VALUE=DATE-TIME:20241013T123852Z
UID:nmps/9
DESCRIPTION:Title: 3D integrability in gauge theories\nby Junya Yagi (Tsinghua) as pa
rt of Nagoya Math-Phys Seminar\n\n\nAbstract\nThe Zamolodchikov tetrahedro
n equation is a fundamental relation for the integrability of 3D lattice m
odels in statistical mechanics\, playing a role similar to the Yang-Baxter
equation in 2D lattice models. I will discuss how solutions of the tetrah
edron equation arise from dualities of supersymmetric gauge theories.\n
LOCATION:https://master.researchseminars.org/talk/nmps/9/
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