Jose Garcia
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 May 10 accepted functional equation involving $f(x/k)$ May 10 asked functional equation involving $f(x/k)$ May 6 answered Finding the derivative with functions inside, such as $g(x) = \dfrac{3x-1}{f(x)}$ May 2 comment Differential Equation $y'=4|y|^{3/4}, y(0)=0$ takning integration with respect to x , since $y=y(x)$ then we have the implicit relation $4x+C=|y|^{1/4}$ applying the condition $y(0)=0$ we get 4.0+C= |y(0)|^{1/4}=0 $so$ C=0 $May 1 asked entire functions approximation by orthogonal polynomials$P_{2n}(z) $May 1 comment Discontinuity and riemann integrability the fractional part function is periodic with period one so$ {ax} $is periodic$ 1/a$for each 'a'. discontinuities are$ 1/n $for n=1,2,3,4,5.... May 1 asked Hadamard finite part in 2 dimensions Apr 17 accepted Residue theorem for a rational integral Apr 16 asked Residue theorem for a rational integral Apr 15 comment A cohomological statement equivalent to the Riemann Hypothesis what differntial operator is he using ?? :) i mean you need a self adjoint operator to get the Riemann zeros as eigenvalues Apr 12 comment Inverse Laplace Transform of zero for any constant$ L^{-1}{C}= C\delta (x) $if$ c=0 $we have$0 \delta (t) =0 $except for the case$ t=0 $Apr 9 asked Why does the Euler-Maclaurin summation formula not exist in$2$or more dimensions? Apr 4 answered Asymptotic expansion for$\frac{1}{2\zeta(3)}\int_x^\infty \frac{u^2}{e^u - 1} du$? Apr 4 comment Name of$a*b=c$and$b*a=-c$isn't this a dot product algebra .. vectorial or dot product :) Apr 4 accepted evaluation of this integral with a fractional part Apr 4 asked evaluation of this integral with a fractional part Mar 29 comment Spectrum of the Hill Operator$L(y)= -y''+ v(x) y $it is semiclassical WKB method :) to recover the potential Mar 29 answered Spectrum of the Hill Operator$L(y)= -y''+ v(x) y \$ Mar 18 asked Mellin transform of digamma function Mar 17 comment First order ODE proof oh sorry :) , no there is by definition the MOST GENERAL first order differential equation