The 27th Osaka City University International Academic Symposium“Mathematical Science of Visualization,and Deepening of Symmetry and Moduli”
Online & Osaka City University (Building E of Faculty of Science, Lecture Room E408)
March 21st–26th, 2021

ProgramMarch 21st, 2021
10:40-11:00

Opening (Yoshihiro Ohnita)

Chair
11:00-12:00

Hideyuki Ishi
Shun-ichi Amari (Online, RIKEN, Japan)
Geometry of Random Deep Neural Networks: Information Geometry
Point of View
Hiroshi Matsuzoe (Online, Nagoya Institute of Technology, Japan)
Geometry of quasi statistical manifolds

14:00-14:40

15:15-15:20

Opening of Public Lectures (Yoshihiro Ohnita)

Chair
15:20-16:20

Yoshihiro Ohnita
Hideyuki Ishi (Osaka City University, Japan)
情報と幾何 (in Japanese)
Tatsuki Hayama (Senshu University, Japan)
数学 × 工芸：テンソル演算と西陣織 (in Japanese)

16:40-17:40

March 22nd, 2021
Chair
10:00-10:40
11:00-11:40

Chair
14:00-15:00

15:20-16:00

Chihiro Matsuoka
Jun Zhang (Online, University of Michigan Ann Arbor, USA)
Statistical Mirror Symmetry
Asuka Takatsu (Tokyo Metropolitan University, Japan)
Relaxation of optimal transport problem via Bregman divergence
Venkatesh Raghavan
Amit Kharat (Online, Dr. D.Y. Patil Medical College, India)
Using Artiﬁcial Intelligence in Medical Imaging to support the ﬁght against
infectious diseases - Real World Examples.
Sanefumi Moriyama (Online, Osaka City University, Japan)
M2-branes: Integrability and Weyl group16:20-17:00
17:20-17:40

17:40-18:00

Tatsuyoshi Hamada (Online, Nihon University, Japan)
MathLibre: Mathematical Software Environment
Thi Hang Do (Osaka City University, Japan)
Land use/land cover classiﬁcation using object and pixel based classiﬁcation
approaches with medium resolution satellite images: A case study in Lao Cai
Providence, Vietnam
Pavithra Jayasinghe (Osaka City University, Japan)
Evaluating spatio-temporal expansion patterns and urban growth models:A case study of Colombo City, Sri Lanka

March 23rd, 2021
Chair
10:00-11:00
11:20-12:20

Martin Guest
Feng Luo (Online, Rutgers University, USA)
Discrete conformal geometry of polyhedral surfaces and its application
Na Lei (Online, Dalian Institute of Technology, China)
Mesh Generation Based on Computational Conformal Geometry

14:00-14:10

Opening of Short Communications (Masashi Yasumoto)

Chair
14:10-15:10

Masashi Yasumoto
Session 1
Luis Pedro Castellanos Moscoso (Osaka City University)
Degenerations of orbits and left-invariant symplectic structures on Lie groups
Hiroki Ito (Osaka University)
A family of index polynomial invariants for virtual string links
Hiroto Kusano (Osaka City University)
Solution to the reﬂection equation in the symmetric tensor representation
Naomichi Nakajima (Online, Hokkaido University)
Information geometry from singularity theory viewpoint

15:40-16:40

Session 2
Satoshi Ogawa (Osaka City University)
CR-functions of suspension foliations and Dynamical systems
Kento Okuda (Online, Kyushu University)
Uniqueness of local minimizers for crystalline variational problems
Mako Sato (Online, Osaka City University)
Beltrami Fields with a non-constant proportionality factor
Yuichiro Sato (Online, Tokyo Metropolitan University)
Totally umbilical submanifolds in pseudo-Riemannian space forms

17:00-18:00

Session 3
Ryo Takenaka (Osaka City University)
Parafermionic bases of standard modules for twisted aﬃne Lie algebras
Yuta Taniguchi (Osaka City University)
An f -twisted Alexander matrix for knot quandles
Ryotaro Ueda (Osaka University)
Quandle coloring quivers of virtual links using virtual quandles
Jumpei Yasuda (Osaka University)
Presentation of surface links using plat forms

March 24th, 2021
Chair
13:30-14:15

Masashi Yasumoto
Session 4 (of Short Communications)
Shin Hayashi (Online, AIST, JST PRESTO)
Topological invariants and corner states for Hamiltonians on a lattice
Naoki Kitazawa (Online, IMI Kyushu University)
Geometric and constructive understanding of higher dimensional diﬀerentiable
manifolds via explicit Morse functions and fold maps
Masahiro Morimoto (OCAMI))
On minimal PF submanifolds in Hilbert spaces with symmetries

Chair
14:30-15:30

Seiichi Kamada
Akio Kawauchi (Online, OCAMI, Japan)
A spatial arc and the knotting probability
Ayaka Shimizu (Online, Gunma College, Japan)
Region crossing change and Region Select game
Benjamin Bode (Online, ICMAT, Spain)
Visualization of link ﬁbrations and critical points

16:00-16:40
17:00-17:40

Chair
18:00-19:00
19:20-20:00

Wayne Rossman
Konrad Polthier (Online, FU Berlin, Germany)
Branched Covering Surfaces - New Shapes, New Materials and New Processes
Gudrun Szewieczek (Online, TU Wien, Austria)
Discrete ﬂat fronts in hyperbolic space via discrete cyclic circle congruences

March 25th, 2021
Chair
14:30-15:30
16:00-16:40

Akio Kawauchi
Koya Shimokawa (Online, Saitama University, Japan)
3-dimensional topology and poly-continuous patternNaoki Sakata (Online, Saitama University, Japan)
3D nets and handlebody decompositions of 3-manifolds

Chair
17:00-18:00
18:20-19:00
19:20-20:00

Franz Pedit
Ulrich Pinkall (Online, TU Berlin, Germany)
Computing Constrained Willmore Surfaces
Mason Pember (Online, Politecnico di Torino, Italy)
Spherical curvature lines
Katrin Leschke (Online, University of Leicester, UK)
Darboux transforms via a Sym-type formula

March 26th, 2021
Chair
14:30-15:30
16:00-16:40

Chair
17:00-17:40
18:00-18:40
19:00-20:00

Takashi Sakai
Hisashi Naito (Online, Nagoya University, Japan)
Carbon Structures and a Discrete Surface Theory
Wai Yeung Lam (Online, BIMSA Tsinghua University, China)
Circle patterns on surfaces with complex projective structures
Miyuki Koiso
Christian Müller (Online, TU Wien, Austria)
Geometric structures motivated by architecture
Franz Pedit (Online, UMass Amherst, USA)
Isometric Immersions via Variational Calculus
Helmut Pottmann (Online, KAUST, Saudi Arabia)
Smoothness of polyhedral surfaces motivated by applications in computational
design and fabrication