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Jun
23
accepted Can all real/complex vector spaces be equipped with a Hilbert space structure?
Mar
7
accepted What can be said about the minimizer of $\| b - A x \| ^2+ \| x \|^2$?
Feb
1
accepted Expansion of $x^{-1/2}$ at $0$
Jan
28
accepted If A $\subset S^n$ has spherical diameter < $\pi$, then $S^n - A$ contains a closed semisphere.
Oct
27
accepted Is the Empty set an orientable manifold?
Jul
6
accepted The Betti numbers of a triangulated ball relative to a disk in its boundary
Apr
30
accepted Cyclic containment of sets
Oct
19
accepted Where do I fail with this integral (coordinates on a simplex)?
Jul
10
accepted Instantiate spaces in commutative diagram by “appropriate” elements - name of this idea?
May
11
accepted Paradox or Error: On the inclusion of dense subspaces into Hilbert spaces
Mar
29
accepted Why are translation invariant operators on $L^2$ multiplier operators
Mar
28
accepted Proof of $f = g \in L^1_{loc}$ if $f$ and $g$ act equally on $C_c^\infty$
Mar
28
accepted The real part treated like an angle in complex vector spaces
Mar
20
accepted On distributions over $\mathbb R$ whose derivatives vanishes
Mar
19
accepted Topologies on the space $\mathcal D'(U)$ of distributions
Mar
14
accepted Simultaneous orthogonal basis for $L^2$, $H^1_0$, … $H^k_0$
Mar
14
accepted Realification and Complexification of vector spaces
Mar
13
accepted (Question) on Time-dependent Sobolev spaces for evolution equations
Mar
11
accepted Accelerated Order of Convergence
Mar
10
accepted When is the image of a linear operator closed?