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Jul
23
revised What is the mathematical truth behind the Leibniz notation in differentiating twice or more?
Add LaTeX operator "\big" just improving the esthetic of notation.
Jul
20
awarded  Popular Question
Jul
15
reviewed Close Inverse problem can't solve it,:$2^{m+1}+1\mid 3^{2^{m}}+1$,when$2^{m+1}+1$ is prime number,
Jul
15
reviewed Close uniform estimate
Jul
15
reviewed Leave Open Riddle: 1 question to know if the number is 1, 2 or 3
Jul
15
reviewed Close how to check whether feasible solutions exist for linear programming
Jul
15
reviewed Close Second order pde in 2 variables
Jul
15
reviewed Close rectangle of a rectangle
Jul
15
reviewed Close How to determine the MLE of $E(x)$
Jul
15
reviewed Close To show that $e^x > 1+x$ for any $x\ne 0$
Jul
7
comment Can there be generalization of Monty Hall Problem?
See arxiv.org/pdf/1208.2638.pdf
Jul
7
reviewed Close Intersection of two lines in complex numbers given four points
Jul
7
reviewed Close Why is this statement true?
Jul
2
reviewed Approve Elementary number theory proofs using functions
Jul
2
reviewed Leave Open How to show $E(XE(Y\mid F)=E(E(X\mid F)Y)$?
Jul
2
reviewed Leave Open Second order nonlinear differential equation $x''+Hx =A(1-J/(2x^2))$
Jul
2
reviewed Close Usefulness of prime numbers as Threading Timeouts in programming
Jul
2
reviewed Leave Open Evaluate the following Integration--
Jul
2
reviewed Close Find the integral closure of an integral domain in its field of fractions
Jul
2
reviewed Close dependent variable change attribution