Sugawa Laboratory

Sugawa Laboratory

Sugawa Laboratory

Events

Monthly:Tohoku Complex Analysis Seminar (Japanese)
2020.02:Workshop on Geometric Function Theory and Special Functions III
2019.02:Geometric Function Theory and Related Topics
2018.09:International Workshop on Conformal Dynamics and Loewner Theory
2018.02:Workshop on Quasiconformal Mappings and Related Topics
2017.08:Workshop on Geometric Function Theory and Special Functions II
2016.08:Workshop on Geometric Function Theory and Special Functions
2015.04:The 3rd GSIS-RCPAM International Symposium
2014.11:57th Symposium on Function Theory (Japanese)
2013.09.: The 2nd GSIS-RCPAM International Symposium

Lectures and Seminars


Mon Tue Wed Thu Fri
1
8:50-
    Lecture    
2
10:30-
  Lecture     Personal Seminar (Huang)
3
13:30-
Monday Seminar
(Plenary)
Online
Personal Seminar (Kumagai) Lecture   Personal Seminar (Shibata)
4
15:30-
    Personal Seminar (Ma)    

All the seminars are being held in room 609 on 6F of the GSIS building.
Details might change for some reasons.

Monday Seminar


All Monday seminars in this semester will be held online through VooV Meeting.

Next Monday Seminar

Meeting Time:2022/1/31 13:30 - 14:30
Meeting ID:302 070 324
Meeting Link:https://voovmeeting.com/dm/gkAee2gW5EB7
Speaker&Title: Shun Kumagai --- Computing Periodic Points on Veech Surfaces

Previous Monday Seminar

Meeting Time:2022/1/24 13:30 - 14:30
Speaker&Title: Dr. Md. Shafiul Alam --- Schlafli modular equations for generalized Weber functions

Meeting Time:2022/1/17 13:30 - 14:30
Speaker&Title: Xiushuang Ma --- Integral transforms for logharmonic mappings

Meeting Time:2021/12/20 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Modular equations for congruence subgroups of genus zero (II)
Shun Kumagai --- Automorphism groups of dessins d'enfants

Meeting Time:2021/12/13 13:30 - 14:30
Speaker&Title: Gangqiang Chen --- The Bohr-type operator on analytic functions and sections

Meeting Time:2021/12/06 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Modular equations of a continued fraction of order six
Xiushuang Ma --- Convolutions of normalized harmonic mappings

Meeting Time:2021/11/29 13:30 - 15:40
Speaker&Title: Shun Kumagai --- Systoles in translation surfaces
Gangqiang Chen --- An Application of the Schur Algorithm to Variability_Regions of Certain Analytic Functions-I

Meeting TIme:2021/11/22 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- A continued fraction of order twelve as a modular function
Xiushuang Ma --- A convolution property of univalent harmonic right half-plane mappings

Meeting Time:2021/11/15 13:30 - 15:40
Speaker&Title: Shun Kumagai --- General origamis and Veech groups of flat surfaces
Lijie Sun --- C-Fuchsian subgroup in some non-arithmetic lattices

Meeting Time:2021/11/08 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Aspects of Hecke Symmetry: Anomalies, Curves, and Chazy Equations
Xiushuang Ma --- John Disks and K-Quasiconformal Harmonic Mappings

Meeting Time:2021/10/25 13:30 - 15:40
Speaker&Title: Shun Kumagai --- Finite translation surfaces with maximal number of translations
Xiushuang Ma --- Lipschitz spaces and harmonic mappings

Meeting Time:2021/10/18 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Geodesic Rosen continued fractions
Xiushuang Ma --- Concave conformal mappings and pre-vertices of Schwarz-Christoffel mappings

Meeting Time:2021/10/11 13:30 - 15:40
Speaker&Title: Shun Kumagai --- A comb of origami curves in the moduli space M3 with three-dimensional closure
Xiushuang Ma --- Bohr Radius for Subordination and K-quasiconformal Harmonic Mappings

Meeting Time:2021/10/04 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- A sharp double inequality involving generalized complete elliptic integral of the first kind
Xiushuang Ma --- Angular derivatives of quasiconformal harmonic maps on the Poincaré disk

Meeting Time:2021/07/26 14:40 - 15:40
Speaker&Title: Shun Kumagai --- Non-planarity of SL(2, Z)-orbits of origamis in H(2)

Meeting Time:2021/07/19 13:30 - 15:40
Speaker&Title: Xiushuang Ma --- QUASICONFORMAL EXTENSION OF MEROMORPHIC FUNCTIONS WITH NONZERO POLE
Md. Shafiul Alam --- Uniformization of punctured spheres and modular forms

Meeting Time:2021/07/12 13:30 - 15:40
Speaker&Title: Shun Kumagai --- Calculation of Grothendieck dessin of genus 1
Md. Shafiul Alam --- STRUCTURAL PROPERTIES OF QUOTIENT SURFACES OF A HECKE GROUP

Meeting Time:2021/06/28 14:40 - 15:40
Speaker&Title: Xiushuang Ma --- Univalency of convolutions of harmonic mappings

Meeting Time:2021/06/14 13:30 - 15:40
Speaker&Title:Shun Kumagai --- Zapponi-orientable dessins d’enfants
Xiushuang Ma --- Convolution of Harmonic Mappings On The Exterior Unit Disk and the Generalized Hypergeometric Functions

Meeting Time:2021/06/07 13:30 - 15:40
Speaker&Title:Md. Shafiul Alam --- GEODESIC COVER OF FUCHSIAN GROUPS
Xiushuang Ma --- Radius of close-to-convexity and fully starlikeness of harmonic mappings

Meeting Time:2021/01/18 13:30 - 15:40
Speaker&Title:Md. Shafiul Alam --- Arithmetic and geometry of the Hecke groups
Shun Kumagai --- Infinite translation surfaces with infinitely generated veech groups

Meeting Time:2020/12/28 13:30 - 15:40
Speaker&Title:Dr. Limei Wang --- The squeezing function on doubly-connected domains via the Loewner differential equation
Dr. Chen Gangqiang --- ON THE BOHR INEQUALITY WITH A FIXED ZERO COEFFICIENT

Meeting Time:2020/12/21 13:30 - 15:40
Speaker&Title:Md. Shafiul Alam --- CONJUGACY CLASSES OF EXTENDED GENERALIZED HECKE GROUPS
Xiushuang Ma --- Coefficient Estimates and Landau-Bloch's Constant for Planar Harmonic Mappings

Meeting Time:2020/12/07 13:30 - 15:40
Speaker&Title: Dr. Chen Gangqiang --- A GENERALIZED HURWITZ METRIC
Shun Kumagai --- Arithmetic Veech sublattices of SL(2,Z)

Meeting Time:2020/11/30 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Normal Subgroups of Hecke Groups H(λ)
Xiushuang Ma --- Univalency of Convolutions of Univalent Harmonic Right Half-Plane Mappings

Meeting Time:2020/11/16 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- CONVEX STANDARD FUNDAMENTAL DOMAIN FOR SUBGROUPS OF HECKE GROUPS
Shun Kumagai --- Periodic points on the regular and double n-gon surfaces

Meeting Time:2020/11/02 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- TRANSCENDENCE OF ZEROS OF AUTOMORPHIC FORMS FOR CUSPIDAL TRIANGLE GROUPS
Xiushuang Ma --- CLOSE-TO-CONVEXITY CRITERIA FOR PLANAR HARMONIC MAPPINGS

Meeting Time:2020/10/26 13:30 - 15:40
Speaker&Title: Shun Kumagai --- ORIGAMI EDGE-PATHS IN THE CURVE GRAPH
Prof. Toshiyuki Sugawa --- ON THE ORDER OF CONVEXITY FOR THE SHIFTED HYPERGEOMETRIC FUNCTIONS

Meeting Time:2020/10/19 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- EXPLICIT EQUATIONS OF SOME ELLIPTIC MODULAR SURFACES
Xiushuang Ma --- BLOCH CONSTANTS FOR PLANAR HARMONIC MAPPINGS

Meeting Time:2020/10/12 13:30 - 15:40
Speaker&Title: Dr. Ming Li --- Convolutions of Harmonic Right Half-Plane Mappings with Harmonic Strip Mappings
Shun Kumagai --- THE DEFICIENCY OF BEING A CONGRUENCE GROUP FOR VEECH GROUPS OF ORIGAMIS

Meeting Time:2020/10/05 13:30 - 15:40
Speaker&Title: Md. Shafiul Alam --- Modular curves and bases for the spaces of cuspidal modular forms
Xiushuang Ma --- Certain multipliers of univalent harmonic functions