Tim kinsella

Anything I can mistake in the dark for being what I'm looking for is good enough for me.

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Does there exist a continuous function $f: \Bbb R\to \Bbb R$ that is rational at (Lebesgue) almost every irrational, and irrational at every rational?

general-topology analysis measure-theory asked May 10, 2019 at 1:29

math.stackexchange.com

26 votes

How and why would (Bernie Sanders’) Medicare for All abolish private health insurance in the US?

united-states healthcare health-insurance asked Jan 28, 2020 at 18:25

politics.stackexchange.com

21 votes

Are there common inequivalent definitions of Cartan subalgebra of a real Lie algebra?

lie-groups lie-algebras asked Dec 17, 2014 at 0:31

math.stackexchange.com

20 votes

Can two different topological spaces cover each other?

general-topology algebraic-topology covering-spaces asked Aug 5, 2016 at 5:15

math.stackexchange.com

18 votes

What good is the phrase "Taylor series"?

calculus asked Dec 13, 2015 at 18:27

matheducators.stackexchange.com

16 votes

Does the "how old is the shepherd" phenomenon occur for more relatable word problems?

reference-request primary-education asked Oct 17, 2016 at 8:50

matheducators.stackexchange.com

16 votes

Why does Sweden support Kurdish separatists in Turkey?

turkey sweden kurdistan asked Feb 17 at 8:39

politics.stackexchange.com

12 votes

Is geodesic distance equivalent to "norm distance" in $SL_n(\mathbb{R})$?

differential-geometry lie-groups riemannian-geometry asked Feb 23, 2016 at 5:42

math.stackexchange.com

11 votes

How should I visualize $S^n$ as the reduced suspension of $S^{n-1}$?

general-topology algebraic-topology homotopy-theory asked Mar 13, 2012 at 18:58

math.stackexchange.com

11 votes

Non-contractible space with trivial homotopy groups

general-topology algebraic-topology asked Feb 16, 2018 at 10:16

math.stackexchange.com

Top Answers

Best book on axiomatic set theory.

math.stackexchange.com

Are quotient groups unique up to isomorphism

math.stackexchange.com

Why do people believe a turing machine can be fully conscious?

philosophy.stackexchange.com

Why do things have a front and a back?

philosophy.stackexchange.com

The Lebesgue measure of the boundary of a simply connected domain

math.stackexchange.com

How can President Biden claim his Build Back Better Agenda costs zero dollars?

politics.stackexchange.com

Cup product on torus

math.stackexchange.com

Star-shaped domain whose closure is not homeomorphic to $B^n$

math.stackexchange.com

Is hedgehog of countable spininess separable space?

math.stackexchange.com

Example of commuting vector fields generating globally noncommuting flows

math.stackexchange.com

Is volume form equal to the top-dimensional form with coefficient $1$?

math.stackexchange.com

Book on "Measure and integration" for starters.

math.stackexchange.com

$fg\in L^1$ for all $g\in L^q$ $\Longrightarrow f\in L^p$

math.stackexchange.com

Continuous bijections between $\mathbb{R}^2$ and $\mathbb{R}^2 \setminus \{(0,0)\}$

math.stackexchange.com

Does there exist a function such that $\lim_{x \to a} f(x) = L$ for all $a \in \mathbb R$ but $f(x)$ is never $L$?

math.stackexchange.com

Do two elements in the same homology class have the same homology?

math.stackexchange.com

What did Poincaré mean when he said "Mathematicians do not deal in objects, but in relations among objects"?

philosophy.stackexchange.com

Is it true that if a Lie group act trivially on an open subset of a manifold the action of the group is trivial (on the whole manifold)?

math.stackexchange.com