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1d
reviewed No Action Needed Why is the function defined by $f(x_1,x_2)=0$ when $x_1=0$, and $x_2$ when $x_1\neq 0$ not regular?
1d
reviewed Reopen Edited: Proper nonsingular smooth map between connected manifolds is a covering map
1d
reviewed No Action Needed How to solve system of Differential Equations with 1 independent and 3 dependent variables
1d
reviewed Close When a function is non differentiable in every point does it mean that it has no instantaneous rate at every point?
1d
reviewed Approve suggested edit on Give an example of two uncountable sets A and B such that A ∩ B is
1d
reviewed Approve suggested edit on How to factor $x + 1 - 2 \sqrt x$?
1d
reviewed No Action Needed $\overline{M\setminus X}=M\setminus\operatorname{int}(X) $?
1d
reviewed Close Solving $x^2-6=\sqrt{x+6}$
1d
reviewed Close Give an example of an infinite non-commutative ring R with char(R)=15
1d
reviewed Leave Closed How do you find the angle between a diagonal of a cube and one of its faces?
1d
reviewed Leave Closed Local ring and zero divisors
2d
reviewed Close But how to prove that $int(X) \subset int(int(X))$?
2d
reviewed Close Solve definite integral using complex-variable technique. (Engineering mathematics class)
2d
reviewed Leave Open How to evaluate $\frac{1}{2\pi }\int_{-\pi }^{\pi }\dfrac{\sin n\theta }{\sin\theta }d\theta $?
2d
reviewed Close How do irrational numbers lie on the number line?
2d
reviewed Close DEFINITE INTEGRAL Caution
2d
reviewed Close how to integrate $\int_{0}^1 \sqrt{(e^x+e^{-x}+2)} dx $?
2d
reviewed Close An abelian Banach algebra without characters
2d
reviewed Leave Open group and subgroups
2d
reviewed Leave Open How do I prove that this is or isn't isomorphic?