matovitch

91 reputation

bio	website
	location	France
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visits	member for	1 year, 2 months
	seen	May 4 at 9:13
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	91 reputation	bio	website		visits	member for	1 year, 2 months
4 badges		location	France		seen	May 4 at 9:13

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Dec 4	revised	Prove $\left\|\frac{x^2y^3}{x^4+y^4}\right\|\leq \|x\|+\|y\|$ added 46 characters in body
Dec 4	comment	Prove $\left\|\frac{x^2y^3}{x^4+y^4}\right\|\leq \|x\|+\|y\|$ Ok, thank you. :)
Dec 4	comment	Prove $\left\|\frac{x^2y^3}{x^4+y^4}\right\|\leq \|x\|+\|y\|$ @Thomas Andrew : Absolutely, thanks. ( I'm new on this kind of forum but is it recommended to edit my answer ?)
Dec 4	comment	Prove $\left\|\frac{x^2y^3}{x^4+y^4}\right\|\leq \|x\|+\|y\|$ I don't see what you are looking for, this is a proof,isn't it ? (I'm sorry I'm french and my english is ugly :()
Dec 4	answered	Prove $\left\|\frac{x^2y^3}{x^4+y^4}\right\|\leq \|x\|+\|y\|$
Dec 4	answered	Find the equation of the parabola
Mar 7	comment	How fast is a low denominator encountered, when using only mediants? It is a product of a matrice with integer coefficients with $\left(\begin{array}{c} x\\ y\end{array}\right)$ so there are integers...I think. $\alpha=yd-cx$ and $\beta=bx-ya$
Mar 7	revised	How fast is a low denominator encountered, when using only mediants? added 214 characters in body
Mar 6	revised	How fast is a low denominator encountered, when using only mediants? deleted 67 characters in body
Mar 6	revised	How fast is a low denominator encountered, when using only mediants? deleted 18 characters in body
Mar 6	revised	$\sum \cos$ when angles are in arithmetic progression added 19 characters in body
Mar 6	answered	How fast is a low denominator encountered, when using only mediants?
Mar 6	awarded	Supporter
Mar 6	answered	$\sum \cos$ when angles are in arithmetic progression
Mar 6	comment	Maclaurin expansion $\log\left( \frac{1+x}{1-x}\right)$, show equality of two sums I'm french, so I hope that it will be "understandable". I separated the even and odd terms.
Mar 6	awarded	Editor
Mar 6	revised	Maclaurin expansion $\log\left( \frac{1+x}{1-x}\right)$, show equality of two sums edited body
Mar 6	answered	Maclaurin expansion $\log\left( \frac{1+x}{1-x}\right)$, show equality of two sums
Mar 5	answered	Computing partial derivatives.
Mar 5	answered	Convert ellipse parameter from General parametric form to General polar form