Rafid
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 May4 awarded Nice Question Dec8 awarded Famous Question Jun22 comment Good 1st PDE book for self study How difficult is this book? What are the prerequisites? Jun19 comment General solution of a simple PDE Thanks @martini, that seem to do the job! Jun19 accepted General solution of a simple PDE Jun19 comment General solution of a simple PDE Not really to be honest, I am not expert in PDE. But let me read through it. Jun19 asked General solution of a simple PDE May21 awarded Popular Question Mar12 awarded Notable Question Oct3 awarded Popular Question May25 answered What to do with these e's to solve for x? May22 accepted Calculating the divergence of a vector field using non-cubic volumes May22 comment What is the larger of the two numbers? @Gerry, although I liked your comment, but I might disagree that all we want is to get our answer accepted. First, we can still get likes form others if the answer is correct (see for example Robert's answer). Second, we need to get those questions answered for the benefits of others anyway. May22 comment Calculating the divergence of a vector field using non-cubic volumes Thanks for the answer, and for the time you spent writing it :-) May21 asked Calculating the divergence of a vector field using non-cubic volumes Mar4 revised How can adding an infinite number of rationals yield an irrational number? added 12 characters in body Mar4 comment How can adding an infinite number of rationals yield an irrational number? This is my point. There is nothing magic with irrational numbers and they just use the same digits that rational numbers, so there is no surprise or counter-intuition in having irrational numbers representable as an infinite sum of rational numbers. Mar4 answered How can adding an infinite number of rationals yield an irrational number? Dec25 comment What is the solution of $f(x)\cdot f(-x) = 1$ Take it easy my friend :-) I just didn't understand your solution at the beginning. Thanks for the clarification indeed. Dec25 accepted What is the solution of $f(x)\cdot f(-x) = 1$