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17
Source for Hilbert's famous quote "Mathematics in Göttingen? There really is none anymore"
hsm.stackexchange.com

13
What does $\mathbf G_m$ really mean?
math.stackexchange.com

12
Is there a smooth surjective map from a connected manifold onto a manifold with higher dimension?
math.stackexchange.com

10
Trivialisation of vector bundles on Stein spaces
mathoverflow.net

8
Why is this map a covering map of the Klein bottle?
math.stackexchange.com

8
Is Lemma D4.5.3 in the Elephant correct? (“In a topos, weakly projective implies internally projective.”)
mathoverflow.net

7
Image of Homomorphism of Lie groups
math.stackexchange.com

7
Which mathematicians have influenced you the most?
math.stackexchange.com

7
Does every even-dimensional Lie group admit a complex structure?
math.stackexchange.com

6
Gap between "fibration" and "fiber bundle".
math.stackexchange.com

6
Every finitely generated flat module over a ring with a finite number of minimal primes is projective
math.stackexchange.com

6
Proving that a variety of dimension zero is discrete.
math.stackexchange.com

6
Composition of two continuous, surjective functions, which is a covering map
math.stackexchange.com

5
On the smooth structure of $\mathbb{R}P^n$ in Milnor's book on characteristic classes.
math.stackexchange.com

5
Module homomorphism question
math.stackexchange.com

5
Vanishing terms in Leray spectral sequence
math.stackexchange.com

5
Every finitely generated flat module over a ring with finitely many minimal primes is projective
mathoverflow.net

5
Some interesting and elementary topics with connections to the representation theory?
mathoverflow.net