Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Hiroshi Tsunogai"'
Autor:
Hiroshi Tsunogai
Publikováno v:
Tokyo J. of Math. 39, no. 3 (2017), 901-922
In this article, we consider an analogue of Noether's problem for the fields of cross-ratios, and discuss on a rationality problem which connects this with Noether's problem. We show that the affirmative answer of the analogue implies the affirmative
Publikováno v:
Journal of the Institute of Mathematics of Jussieu. 9:431-448
We study behaviours of the ‘equianharmonic’ parameter of the Grothendieck–Teichmüller group introduced by Lochak and Schneps. Using geometric construction of a certain one-parameter family of quartics, we realize the Galois action on the funda
Autor:
Hiroshi Tsunogai
Publikováno v:
Primes and Knots. :263-284
Autor:
Hiroaki Nakamura, Hiroshi Tsunogai
Publikováno v:
Primes and Knots. :197-211
Autor:
Hiroshi Tsunogai
Publikováno v:
Israel Journal of Mathematics. 136:221-250
In this article, we consider certain systems of derivation algebras related to Galois representations attached to fundamental groups of algebraic curves of positive genera and establish some stability property. This is a generalization of Ihara’s r
Autor:
Hiroshi Tsunogai, Ki Ichiro Hashimoto
Publikováno v:
Mathematics of Computation. 68:1649-1662
An abelian surface A A is called a QM-abelian surface if its endomorphism ring includes an order of an indefinite quaternion algebra, and a curve C C of genus two is called a QM-curve if its jacobian variety is a QM-abelian surface. We give a computa
Autor:
Hiroshi Tsunogai
Publikováno v:
Mathematische Nachrichten. 171:315-324
In § l of this article, we study group-theoretical properties of some automorphism group Ψ* of the meta-abelian quotient § of a free pro-l group § of rank two, and show that the conjugacy class of some element of order two of Ψ* is not determine
Autor:
Hiroshi Tsunogai
Publikováno v:
Publications of the Research Institute for Mathematical Sciences. 31:113-134
Autor:
Hiroshi Tsunogai, Ki Ichiro Hashimoto
Publikováno v:
Galois–Teichmüller Theory and Arithmetic Geometry, H. Nakamura, F. Pop, L. Schneps and A. Tamagawa, eds. (Tokyo: Mathematical Society of Japan, 2012)
Suppose that a finite group $G$ is realized in the Cremona group $\mathrm{Cr}_m (k)$, the group of $k$-automorphisms of the rational function field $K$ of $m$ variables over a constant field $k$. The most general version of Noether's problem is then
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52010dd3b1dd3baf491f6eeb3bb90eab
https://projecteuclid.org/euclid.aspm/1540417819
https://projecteuclid.org/euclid.aspm/1540417819
Autor:
Hiroshi Tsunogai, Ki Ichiro Hashimoto
Publikováno v:
Proc. Japan Acad. Ser. A Math. Sci. 79, no. 9 (2003), 142-145
In this article, we construct generic polynomials over $\boldsymbol{Q}$ with two parameters for all transitive subgroups of the symmetric group of degree 5 by considering the action on the moduli space of the projective line with ordered five marked
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e823c46075a5d3d7b3d6560fd9200f4
http://projecteuclid.org/euclid.pja/1116443730
http://projecteuclid.org/euclid.pja/1116443730