Nik Weaver's user avatar
Nik Weaver's user avatar
Nik Weaver's user avatar
Nik Weaver
  • Member for 11 years, 11 months
  • Last seen this week
21 votes

What is a foliation and why should I care?

21 votes

Nonseparable Hilbert spaces

20 votes
Accepted

What is the intuition for the trace norm (nuclear norm)?

20 votes
Accepted

functions from Q to itself with derivative zero

20 votes

Is V, the Universe of Sets, a fixed object?

20 votes

Books that teach other subjects, written for a mathematician

19 votes

are quotients by equivalence relations "better" than surjections?

19 votes

"Paradoxes" in $\mathbb{R}^n$

18 votes
Accepted

Perturbation of unbounded self-adjoint operators

18 votes

Advice for researchers outside academia

18 votes

How much of the axiom of choice do you need in mathematics?

17 votes

Rigged Hilbert spaces and the spectral theory in quantum mechanics

17 votes
Accepted

Is there a Cantor set $C$ in $\mathbb{R}^{2}$ so the graph of every continuous function $[0,1]\rightarrow [0,1]$ intersects $C$?

17 votes
Accepted

Diameter of a quotient of the infinite dimensional sphere

17 votes
Accepted

Operator that commutes with projections

17 votes

Why should we study derivations of algebras?

17 votes

Existence of a strange measure

17 votes
Accepted

Does this "jumping-ahead" ordinal function exist?

17 votes
Accepted

Is this a characterization of commutative $C^{*}$ algebras?

16 votes

Why not adopt the constructibility axiom $V=L$?

16 votes
Accepted

Quantum functional analysis

15 votes

If a (distance) metric on a connected Riemannian manifold locally agrees with the Riemannian metric, is it equal to the induced metric?

15 votes

Surjective linear isometries on $\ell_\infty(\mathbb{N})$

15 votes

Is amateur research in mathematics viable?

15 votes

Does anyone understand this comment about the continuum hypothesis?

15 votes

Extremely messy proofs

14 votes

A natural center of a convex weakly compact set in Banach space

14 votes
Accepted

is this von Neumann algebra a tensor product?

14 votes
Accepted

Uncountable Pre-Image

14 votes
Accepted

Infinite tensor product of states

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