キーワード検索

キーワード 詳細検索

プロフィール

西澤 由輔 ニシザワ ユウスケ

所属部署名 教育学部 電話番号
職名 准教授 ■FAX番号
住所 埼玉県さいたま市桜区下大久保255 ■メールアドレス
■ホームページURL

研究活動業績

研究業績(著書・発表論文等)

論文
Extended a constant part of Redheffer’s type inequalities
,Tamkang J. Math.:79-83 2018
Yusuke Nishizawa

Refined quadratic estimations of Shafer’s inequality
,J. Inequal. Appl.:1-11 2017
Yusuke Nishizawa

Sharp exponential approximate inequalities for trigonometric functions
,Results Math.:609-621 2017
Yusuke Nishizawa

Symmetric inequalities with power-exponential functions
,J. Pure Appl. Math.:335-344 2017
Yusuke Nishizawa

Extended constant parts of Becker-Stark’s and Shafer-Fink’s inequalities
,Tamkang J. Math.:385-391 2016
Yusuke Nishizawa

Double inequalities derived from the arithmetic-geometric-harmonic mean inequalities with power exponential functions
,Research reports of National Institute of Technology, Ube College:9-16 2016
Yusuke nishizawa

A stronger inequality of Cirtoaje’s one with power exponential functions
,J. Nonlinear Sci. Appl.:224-230 2015
Mitsuhiro Miyagi, Yusuke Nishizawa

Sharpening of Jordan’s type and Shafer-Fink’s type inequalities with exponential approximations
,Appl. Math. Comput.:146-154 2015
Yusuke Nishizawa

Extended constant parts of Wilker types and Cusa-Huygens types inequalities
,Far East J. Math. Sci.:579-598 2015
Yusuke Nishizawa

Extension of an inequality with power exponential functions
,Tamkang J. Math.:427-433 2015
Mitsuhiro Miyagi, Yusuke Nishizawa

Sharp Becker-Stark’s type inequalities with power exponential functions
,J. Inequal. Appl.:1-11 2015
Yusuke Nishizawa

An elementary proof of some inequality derived from the function (b^x - a^x) / x
,Research reports of National Institute of Technology, Ube College:41-44 2015
Yusuke Nishizawa, Mitsuhiro Miyagi

A short proof of an open inequality with power-exponential functions
,Aust. J. Math.Anal. Appl.:1-3 2014
Mitsuhiro Miyagi, Yusuke Nishizawa

Proof of an open inequality with double power-exponential functions
,J. Inequal. Appl.:1-11 2013
Mitsuhiro Miyagi, Yusuke Nishizawa

Simultaneous point bifurcations and bubbles for two parameter family of cubic polynomials
,Far East J. Dynam. Syst.:67-82 2011
Eiichi Mitsukura, Yusuke Nishizawa

Heterodimensional tangencies leading to hyperbolic sets and wild hyperbolic strange attractors
,数理解析研究所講究録,1768:38-54 2011
西澤由輔

一次元極限葉層構造をもつ3 次元C1 微分同相写像の力学系について
,北海道大学数学考究録,148:35-42 2011
西澤由輔

オイラーの多面体定理に基づいた数学の教材開発につ いて-コンピュータ・情報機器を用いた授業を通して-
,日本医療科学大学研究紀要:17-29 2011
三田満男,西澤由輔,佐藤宏平

Heterodimensional tangencies on cycles leading to strange attractors
,Discrete Conti. Dynam. Sys.:285-300 2010
Shin Kiriki, Yusuke Nishizawa, Teruhiko Soma

Heterodimenional tangencies から導き出されるstrange attractors とC1- robust homoclinic tangencies について
,数理解析研究所講究録,1688:164-174 2010
西澤由輔

Heterodimensional tangency and hyperbolic sets
,北海道大学数学考究録,142:220-227 2010
西澤由輔

高校生に対する現代数学の導入の一例-カオス,フラクタルとはなにか?-
,日本医療科学大学研究紀要:47-60 2010
三田満男,西澤由輔

Heterodimenional tangencies on cycle leading to strange attractors
,北海道大学数学考究録,140:61-65 2009
Yusuke nishizawa

Existence of horseshoe sets with nondegenerate one-sided homoclinic tangencies in R3
,Hokkaido Math. J.:133-145 2008
Yusuke Nishizawa