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 Feb19 awarded Popular Question Jul2 awarded Curious Jan3 comment Looking for the functions $\alpha_n(x)$ that satisfy $\sum_{n=0}^{\infty} e^{i \alpha_n(x)}\frac{H_n(x)}{\sqrt{2^n n!}}=0$ @Mr.G The question focuses on real $\alpha_n(x)$, but I would be interested if you can find complex ones! Dec28 awarded Promoter Dec27 revised Looking for the functions $\alpha_n(x)$ that satisfy $\sum_{n=0}^{\infty} e^{i \alpha_n(x)}\frac{H_n(x)}{\sqrt{2^n n!}}=0$ deleted 2 characters in body Dec26 comment Looking for the functions $\alpha_n(x)$ that satisfy $\sum_{n=0}^{\infty} e^{i \alpha_n(x)}\frac{H_n(x)}{\sqrt{2^n n!}}=0$ @IgorRivin Any of them. Dec26 asked Looking for the functions $\alpha_n(x)$ that satisfy $\sum_{n=0}^{\infty} e^{i \alpha_n(x)}\frac{H_n(x)}{\sqrt{2^n n!}}=0$ Nov3 comment Constrained variational calculus: Are we allowed to make use of the constraint before taking variations? @OccupyGezi Will there be any need for using Lagrange multiplier after imposing the constraint? Nov3 asked Functions generating prime numbers in math packages Oct27 awarded Popular Question Sep21 answered Geometric meaning of block-diagonalization of a matrix Apr14 revised Constrained variational calculus: Are we allowed to make use of the constraint before taking variations? added 79 characters in body Apr14 asked Constrained variational calculus: Are we allowed to make use of the constraint before taking variations? Apr9 comment differential equation of the square root of a matrix I am wondering why the trajectory lies in the commutant of the algebra generated by A and B. Consider $M(dt)$ where $dt$ is an infinitismal time step. $M(dt)=M(0)+A.M(0).B.dt$ why does this commute with $A$ and $B$ if $M(0)$ does ? Apr7 asked differential equation of the square root of a matrix Mar20 awarded Yearling Feb22 revised Relations between complex functions satisfying a specific condition deleted 72 characters in body; edited title Feb22 comment Relations between complex functions satisfying a specific condition @rlgordonma yes! Feb22 asked Relations between complex functions satisfying a specific condition Jan18 accepted Integral of Hermite polynomial multiplied by $\exp(-x^2/2)$