# chyanog

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bio website location China age member for 9 months seen 15 mins ago profile views 191

I'm interested in Mathematics, Programming.

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 1d comment How to asynchronously download 100000 urls in an efficient wayYou should consider using python. 2d awarded Nice Question 2d revised How can I compile this functionadded 230 characters in body 2d revised How can I create a list of functions?added 24 characters in body 2d revised How can I create a list of functions?deleted 64 characters in body 2d answered How can I create a list of functions? May17 revised Can you recommend an efficient method for finding the least integer satisfying my inequality?deleted 369 characters in body May16 answered Problem with simplifying Sinc function May16 revised How to simplify an expression with special functions to zeroadded 144 characters in body May15 answered How to simplify an expression with special functions to zero May13 comment Symbolic integration in real domain only ( assumptions and ComplexExpand don't work)@Artes Integrate[m^2/((1 - m^2)^2 + 1), {m, 0, 1}], Maple 17 gives 1/8 Sqrt[-1 + Sqrt[ 2]] (2 (2 + Sqrt[2]) ArcTan[Sqrt[2 (1 + Sqrt[2])]] + Sqrt[2] Log[5 + 4 Sqrt[2] - 2 Sqrt[2 (7 + 5 Sqrt[2])]]) May13 comment How to collect/reduce with respect to multiple variables?@xzczd, Updated. May13 revised How to collect/reduce with respect to multiple variables?added 84 characters in body May12 revised How to collect/reduce with respect to multiple variables?deleted 9 characters in body May12 revised How to collect/reduce with respect to multiple variables?added 80 characters in body May12 revised How to collect/reduce with respect to multiple variables?added 116 characters in body May12 answered How to collect/reduce with respect to multiple variables? May9 accepted How do I put an image on the complex plane? May9 comment Join all square root expressions?Holw about expr //. Sqrt[x_] Sqrt[y_] -> Sqrt[x y]. May9 comment How do I expand StirlingS2[n, 10] in terms of elementary functions?Try FunctionExpand[StirlingS2[n, 10], Element[n, Integers] && n > 0].