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14
math fallacy problem: $-1= (-1)^3 = (-1)^{6/2} = \sqrt{(-1)^6}= 1$?
math.stackexchange.com

13
Finite-dimensional subspace normed vector space is closed
math.stackexchange.com

13
Lemma, theorem, corollary... which one is a suitable term for an observation?
math.stackexchange.com

12
Understanding the philosophy behind the axiomatic definition of reals
math.stackexchange.com

12
Trying to visualize the hierarchy of mathematical spaces
math.stackexchange.com

12
Show all of my question/answers to me even if they are deleted
meta.stackexchange.com

10
Notation for matrix and sum of matrix rows
math.stackexchange.com

10
How would you count a base $> 36$ system?
math.stackexchange.com

9
Homeomorphism of two compact sets
math.stackexchange.com

9
Are countable topological spaces second-countable?
math.stackexchange.com

9
Static inner class in python
stackoverflow.com

9
Consistent typography
tex.stackexchange.com

8
A big "smallest" number
math.stackexchange.com

8
Does the forgetful functor from $\mathbf{TopGrp}$ to $\mathbf{Top}$ admit a left adjoint?
math.stackexchange.com

7
An example of open closed continuous image of $T_0$-space that is not $T_0$
math.stackexchange.com

6
Can anyone give me a counterexample to this statement?
math.stackexchange.com

6
Continuous functions from a topological space to itself.
math.stackexchange.com

6
Topological transitivity and surjectivity.
math.stackexchange.com

6
Intuition for proof of monotone class theorem?
math.stackexchange.com

6
Examples of Kreisel-Putnam topological spaces
mathoverflow.net

5
Sufficient conditions for $M(X \times Y, Z)$ to be homeomorphic to $M(X, M(Y, Z))$
math.stackexchange.com

5
Topology problem - compactness
math.stackexchange.com

5
Hausdorff metric and Vietoris topology
math.stackexchange.com

5
Spaces $X$ in which every subset is either open or closed, and only $\varnothing$ and $X$ are clopen
math.stackexchange.com

5
Proper maps for connectedness
math.stackexchange.com

5
Is there a closed totally disconnected space meeting every component?
math.stackexchange.com

5
Can we define a topology on $\mathbb{R}^2$ using lines instead of circles or squares?
math.stackexchange.com