Open Seminar

8 Aug 2016 Thur. 16:00-17:00
Inst. Math. D814

Yoshikazu Yamagishi (Ryukoku Univ.)
Disk packing on the logarithmic spiral lattice

20 May 2016 Fri. 17:00-18:00
Inst. Math. D509

Isao Kiuchi (Yamaguchi Univ.)
On Ranamujan Sum.

25 Jan. 2016 Mon. 16:45-18:30
Inst. Math. D814

Dong-Han Kim (Dongguk Univ.)
A new complexity function of repetition and irrationality exponents.

5 Oct. 2015 Mon. 16:15-17:15
Inst. Math. D814

Koji Nuida (AIST/JST)
Polynomial expression of addition and multiplication.

27 Jul. 2015 Mon. 16:15-17:15
Inst. Math. D509

Brigitte Vallée (Univ. Caen)
A probabilistic study for the recurrence function of sturmian words.

23 Feb. 2015 Tue. 14:00-16:00
Inst. Math. B722

Yuichi Kamiya (Daito Bunka Univ.)
On power sums for the coding system related to the regular paperfolding sequence.

2 Feb. 2015 Tue.
Inst. Math. D814

Takao Komatsu (Wuhan Univ.)
q-multiparameter-Bernoulli polynomials and q-multiparameter-Cauchy polynomials by Jackson's integrals

Tomohiro Ooto (Univ.Tsukuba)
Quadratic approximation in Fq((T -1))

22 Aug. 2014 Fri. 14:00-15:00
Inst. Math. D814

Ryoko Tomiyasu (KEK)
Application of C-type lattice reduction theory to the determination problem of 3-dim lattices from length spectra.

5 Feb. 2014 Wed. 15:30-17:30
Inst. Math. D814

Bo Tan (Huazhong Univ. of Science and Technology)
The graph of continuous function and packing dimension.

13/9/2013 Fri. -- 14/9/2013 Sat. 10:00-17:30
Inst. Math. D814

Tiling Meeting at Tsukuba

25/7/2013 Thu. 16:00-17:00, 17:10-
Inst. Math. D509

Yu Yasufuku (Nihon Univ.)
Coordinate growth of points in an orbit.

Inst. Math. B722
12/7/2013 Fri. 15:15-16:10
Nobuhiro Terai (Ashikaga Inst. Tech.)
A note on the Diophantine equation concerning Pythagorean numbers.

13/7/2013 Sat. 10:00-10:50
Chih-Hung Chang (Feng Chia Univ.)
Multi-layer Cellular Neural Networks: Deep and Shallow Architectures.

13/7/2013 Sat. 11:00-11:50
Chuan-Sheng Wei (Feng Chia Univ.)
Multiple Zeta Values : Evaluations and Relations.

15/3/2013 Fri. 15:15-16:10
Inst. Math. D814

Kentaro Nakaishi
Pisot conjecture and Rauzy fractals

1/11/2012 Thu. 15:15-16:30
Inst. Math. D814

Ma. Louise Antonette N. De Las Peñas(Ateneo De Manila University Philippines)
Color Symmetries Associated with Non-Periodic Structures

Move to University of Tsukuba.
3/3/2012 Mon. 15:00-16:00
Fac. Sci. A504

Koichiro Akiyama (Toshiba Corp.)
A Public-key Cryptosystem based on the Diophantine Problems on Fp[t].

13/1/2012 Fri. 14:00-17:00
Fac. Sci. A507

14:00-14:40 Attila Pethő (Debrecen Univ.)
On the number of some classes of polynomials.

14:45-15:25 Yusuke Suzuki (Niigata Univ.)
Y-Rotations in k-minimal projective-planar quadrangulations.

15:30-16:10 Florian Luca(UNAM)
Diophantine equations with generalized Fibonacci numbers.

16:15-16:55 Shigeki Akiyama (Niigata Univ.)
On the aperiodicity of Ammann tiles.

4/8/2011 Thu., Fac. Sci. A510

15:00-15:50 Benoît Loridant (FWF Project researcher)
Boundary parametrization of a class of Rauzy fractals.

11/5/2011 Wed., Fac. Sci. A510

15:00-16:00 S. D. Adhikari (Harish-Chandra Inst.)
Two problems related to integer lattice points in the plane.

21/2/2011 Mon., Fac. Sci. A510

15:30-17:00 Tetsuro Kamae (Osaka City U. Alumni)
Behavior of various complexity functions.

10/12/2010 Fri., Fac. Sci. A510

15:00-15:50 Yuichi Kamiya (Daito Bunka U.)
Relations among arithmetical functions, automatic sequences,
and sum of digits function associated with certain Gray codes
(joint work with Leo Murata)

16:00-17:00 Robert Tichy (Graz Tech. Univ.)
Digital expansions: Arithmetics and Dynamics

24/6/2010 Thu., Fac. Sci. A510

14:00-14:50 Makoto Minamida(Nagoya U.)
An analogue of the Voronoi formula

15:00-15:50 Edmund Harriss (Univ. Leister)
Tilings, Puzzles and the limits of mathematics

23/1/2010 Sat., Fac. Sci. A507

Paulius Drungilas (Vilnius Univ.)
Multiplicative independence of quadratic units

Shigeki Akiyama
Self-similar dissection puzzle

Yoshio Tanigawa (Nagoya U.)
Modular forms and the Clausen-type identities.

23/12/2009 Wed. 16:30-, Fac. Sci. A507
Yuichi Kamiya (Daito Bunka U.)
Sum of digits associated to Gray code and its relation to arithmetic function.
16/11/2009 Mon., Fac. Sci. A507

Hajime Kaneko(Kyoto U.)
On the binary expansions of algebraic numbers

12/10/2009 Mon., Fac. Sci. A507

Nobuhiro Terai (Ashikaga Inst. Tech.)
Integer points and independent points on the elliptic curve y = x3 - pkx (joint work with Y. Fujita).

Kálmán Győry (Debrecen Univ.)
On certain arithmetic graphs and their applications to diophantine problems.

Attila Pethő (Debrecen Univ.)
On a family of collision-free functions.

Benoît Loridant (Niigata Univ. JSPS)
Boundary parametrization of canonical number system tiles.

6/10/2009 Tue., Fac. Sci. A504

Takao Komastu(Hirosaki U.)
s-term leaping recurrence relations.

7/9/2009 Mon., Fac. Sci. A507
Ryotaro Okazaki (Doshisha U.)
On Weber's Class Number Problem and Cyclotomic Unit
11/8/2009 Tue., Fac. Sci. A504
Julien Bernat (U. Nancy 1)
Arithmetics in non-integer base
26/5/2009 Tue., Fac. Sci. A510
Lajos Hajdu (Debrecen Univ.)
Perfect powers in arithmetic progression

Attila Bérczes (Debrecen Univ.)
Effective results on certain subvarieties of tori

7/4/2009 Tue., Fac. Sci. A510
Wolfgang Steiner (CNRS, U. Paris 7)
Natural extensions for digital expansion
4/2/2009 Wed., Fac. Sci. A510
Edmund Harriss (Imperial College London)
Self-similar puzzles.

Jun Luo (San Yat Sen U., Gangzhou)
Tangram Puzzle Shape & 2D tilings.

Tetsuro Kamae(Matsuyama U.)
Problems related to the uniform sets.

2/12/2008 Tue., Fac. Sci. A504
Hajime Kaneko (Kyoto U. D2)
Uniform distribution, in particular Borel conjecture and its generalizations.

26/11/2008 Wed., Fac. Sci. A510
Igor Shparlinski (Macquarie University)
Fermat Quotients (joint work with J. Bourgain, K. Ford and S. Konyagin).

14/10/2008 Tue., Fac. Sci. A510
Jeong-Yup Lee (KIAS)
The Meyer property on substitution point sets.

11/8/2008 Mon., Fac. Sci. A510
Andrea Huszti (Debrecen Univ.),
Secure Electronic Voting Schemes

Akos Pinter (Debrecen Univ.),
Combinatorial geometry, diophantine equations and modular forms

4/2/2008 Mon., Fac. Sci. A502
Sukumar Das Adhikari (Harish-Chandra Inst.)
Some classical zero-sum problems in Combinatorial Number Theory.
23/10/2007 Tue., Fac. Sci. A502
Arturas Dubickas (Vilnius University, Lithuania)
1) Some problems for the conjugates of Salem and Pisot numbers
2) Sumsets of Salem and Pisot numbers

31/7/2007 Tue., Fac. Sci. A510
Yuishi Kamiya (Maiji Gakuin U.)
A formula to express Dirichlet series having analytic continuation.

14/2/2007 Wed., Fac. Sci. Sem. 1
DoYong Kwon (Yonsei U., Seoul)
Symbolic dynamics of addition and multiplication -- with application to number theory

Shuichi Hayashida(Seigen U.:Germany)
Introduction to number theory and automorphic forms

21/11/2006 Tue., Fac. Sci. A507
Jonathan Sondow (Keio U. COE)
New formulas for π, e, Euler's constant, and ζ(s)

16/1/2006 Mon., Fac. Sci. A507
Attila Petho (Debrecen Univ.)
From generalized radix representations to dynamical systems.

This list may not be complete.

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