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52m ago
Number of subsets the cardinality of whose intersections with some other subsets are known
— Cech Cohomology
312
2h ago
If $f:U\to \mathbb{R}$ is continuous and $(x^2+y^4)f(x,y) + (f(x,y))^3=1$, then $f$ is $C^\infty$
— paimfp
61
4h ago
What is the professional term for the combination of the selection in n out of the total m elements?
— Abby Chau Yu Hoi
1111
10h ago
Question about notation in a theorem about Galois theory from Lang's Algebra (chapter 6 §1, corollary 1.16)
— Erik Vesterlund
161
12h ago
non negative solution of the matrix equation $A^T U A = U−C$ if C is non-negative
— user38524
61
16h ago
Closed form for $\int_0^\infty\frac{\log\left(1+\frac{\pi^2}{4\,x}\right)}{e^{\sqrt{x}}-1}\mathrm dx$
— Oksana Gimmel
855211
16h ago
Show groups of symmetries of a cube and a tetrahedron are not conjugate in isometry group.
— Wooster
83
18h ago
Mathematicians conceived of black holes long before astronomers actually found any?How?
— eminemence
1382
