>>179 追記

下記のピエロ紹介の論文（>>171）は、結構大学１年〜２年の教育素材として、面白いと思う（＾＾

有理数の稠密性と無理数の関係
”DIOPHANTINE APPROXIMATION”
関数の連続・不連続
微分可能と不可能と
それに、関数ｙ＝1/x^ｖ の指数ｖによる属性の変化

さまざまな数学の要素が融合して
実に面白い素材だし

数学史の一コマにも使えるかな？（＾＾

http://www.unirioja.es/cu/jvarona/downloads/Differentiability-DA-Roth.pdf
DIFFERENTIABILITY OF A PATHOLOGICAL FUNCTION,
DIOPHANTINE APPROXIMATION,
AND A REFORMULATION
OF THE THUE-SIEGEL-ROTH THEOREM
JUAN LUIS VARONA
This paper has been published in Gazette of the Australian Mathematical Society, Vol-
ume 36, Number 5, November 2009, pp. 353{361.
Received 29 February 2008; accepted for publication 6 October 2009.

http://www.unirioja.es/cu/jvarona/
Juan L. Varona Dept. of Mathematics and Computation University of La Rioja

https://en.wikipedia.org/wiki/University_of_La_Rioja
University of La Rioja
(抜粋)
Type Public
Established 1992
Students 7,600
Address Avda. de la Paz, 93 26006, Logrono., Logrono, Spain
Website http://www.unirioja.es

The University of La Rioja (UR) is a public institution of higher education based in Logrono, La Rioja, Spain.
Inaugurated during 1992-1993 from various existing schools and colleges, it currently teaches Grades 19 adapted to the European Higher Education,
and a varied program of masters, summer courses and courses of Spanish language and culture for foreigners.
(引用終わり)