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May 11 (Tue), 2021 (15:00-16:00 at Zoom)
Takayuki Okuda (Hiroshima University) :
Delsarte theory on compact homogeneous spaces
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May 18 (Tue), 2021 (15:00-16:00 at Zoom)
Keisuke Teramoto (Hiroshima University) :
Focal surfaces of wave fronts with respect to unbounded principal curvatures
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May 25 (Tue), 2021 (15:00-16:00 at Zoom)
Serban Matei Mihalache (Tohoku University) :
Invariants of 3-manifolds using branched spines and Hopf algebras
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June 15 (Tue), 2021 (15:00-16:00 at Zoom)
Tsukasa Ishibashi (Research Institute for Mathematical Sciences, Kyoto University), Wataru Yuasa (Research Institute for Mathematical Sciences, Kyoto University) :
Skein and cluster algebras of marked surfaces without punctures for sl(3)
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July 13 (Tue), 2021 (15:00-16:00 at Zoom)
Shintaro Akamine (Nihon University) :
Reflection principles for maximal surfaces and related topics
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July 20 (Tue), 2021 (15:00-16:00 at Zoom)
Naoki Kitazawa (Kyusyu University) :
Round fold maps on 3-dimensional
closed manifolds
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July 27 (Tue), 2021 (15:00-16:20 at Zoom)
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Kento Ogawa (Hiroshima University) :
Locally Johnson graphs and Galois theory
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Yuya Nishimura (Hiroshima University) :
The computational complexity of classical link recognition
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Shin Kaneda (Hiroshima University) :
Higher genus nonorientable maximal surfaces
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October 26 (Tue), 2021 (15:00-16:00 at Zoom)
Sakumi Sugawara (Hokkaido University) :
Divides with cusps and Kirby diagrams for line arrangements
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November 16 (Tue), 2021 (15:00-16:00 at Zoom)
Takefumi Nosaka (Tokyo Institute of Technology) :
Cellular chain complexes of universal covers of some 3-manifolds
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November 30 (Tue), 2021 (15:00-16:00 at Zoom)
Kotaro Kawasoe (Meiji University) :
The one-row colored $\mathfrak{sl}_{3}$ Jones polynomial for pretzel links
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December 7 (Tue), 2021 (15:00-16:00 at Zoom)
Ivan I. Smalyukh (University of Colorado Boulder) :
Knots in Soft Matter
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December 21 (Tue), 2021 (15:00-16:00 at Zoom)
Katsumi Ishikawa (Research Institute for Mathematical Sciences, Kyoto University) :
Extended quandle spaces and their applications