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An expert is a man who has made all the mistakes, which can be made, in a very narrow field. (Niels Bohr)


Dec
2
reviewed Leave Open Corollary from Maximum Modulus Principle and Schwarz's Lemma
Dec
2
reviewed Leave Open Let $A_{j,k} = \langle x_j, x_k\rangle$. Show $A$ is invertible if and only if $x_1, \ldots, x_n$ are linearly independent.
Dec
2
reviewed Close Showing martingale property of a series
Dec
2
reviewed Leave Open Using mathematical induction show that $\sum_{i=1}^{n+1} i\cdot2^i = n\cdot2^{n+1}+2$ for all $n\ge0$
Dec
2
reviewed Close Inverse of $f(x) = xe^x-x$
Dec
2
reviewed Close Write down the union and intersection of $100$ sets
Dec
2
reviewed Close [Meta]Recovering deleted (ansered)questions
Dec
2
reviewed Close Cross product of two vectors, given magnitudes and angle
Dec
2
reviewed Close Curvature 2-form vs. Sectional Curvature
Dec
2
reviewed Close Proof that a continuous function is zero
Dec
2
reviewed Close Zeroes of an entire function such that $|f(z)|>1 , \forall |z|>1$
Dec
2
reviewed Close Prove that $q$ is a perfect square
Dec
2
reviewed Close binomial coefficient and recurrence relation
Dec
2
reviewed Close If $fg=0$ on a connected region , where $f,g$ are analytic on the connected region , then is either of $f,g$ identically $0$?
Dec
2
reviewed Close How to master Calculus for physics
Dec
2
revised The inverse of a bijective holomorphic function
deleted 30 characters in body
Dec
2
answered The inverse of a bijective holomorphic function
Dec
2
reviewed Close How to split a dataset in test and training set?
Dec
1
reviewed Close Find a differentiable function that satisfies following conditions.
Dec
1
reviewed Close A doubt about the proof of the fact that $\mathbb Z [(1+\sqrt{-19})/2]$ is a pid