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May
9
accepted Long exact sequence for a triple follows from long exact sequence for a pair?
Mar
28
accepted The hyper-derived functors $\mathbb L_\bullet F$ are just derived functors of $H_0F$?
Feb
12
accepted Book suggestions on projective geometry
Jan
28
accepted Homotopically equivalent to Čech nerve?
Jan
28
accepted A seemingly wrong definition of convergence of spectral sequences in Bott & Tu?
Jan
18
accepted Convergence of a sequence with assumption that exponential subsequences converge?
Jan
16
accepted Estimating $\mathbb P\{\max_{1\le j\le n}\lvert S_j\rvert\le t\}$, so called Charles Stein's theorem?
Jan
7
accepted Completeness implies geodesic completeness, a more conceptual way?
Dec
31
accepted Do unit normal vectors of extremal points on a compact hypersurface have opposite directions?
Nov
21
accepted Any real analytic Frobenius theorem used in the proof of integrable almost complex manifolds to arise from complex manifolds?
Nov
19
accepted $\left\{\,f\in L^1[0,1]\,\big\vert\,\int_0^1\lvert f\rvert^2>1\right\}$ is open
Nov
15
accepted Is the $\sigma$-finiteness condition necessary to ensure that $L^p(\mu)$ is reflexive?
Oct
25
accepted Proper and free action of a discrete group
Aug
25
accepted Homology of a finite graph follows from Mayer-Vietoris sequence?
Aug
21
accepted A generalization of Jordan curve theorem to connected open sets in the plane
Aug
21
accepted Cover a sphere by two closed subsets not containing a closed self-antipodal connected subset?
Jul
14
accepted The geometric interpretation for extension of ideals?
Jul
5
accepted Topological/homotopical classification for 1-dim CW-complexes?
Jun
26
accepted Simplicity is invariant under extension of scalars
May
18
accepted Why is the projection map proper?