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diracdeltafunk
  • Member for 12 years, 8 months
  • Last seen this week
50 votes
Accepted

Are there statements so self-evident that writing a proof for them is meaningless? Is this an example of one?

29 votes
Accepted

Is there any simple set of properties which uniquely characterizes differentiation?

27 votes
Accepted

Are there any famous/notable mathematicians who have their own YouTube channel?

18 votes

is differential geometry really required to understand anything in algebraic geometry?

17 votes
Accepted

Does every commutative ring have $2^n$ idempotents?

12 votes

Adjoining a function to a ring: what is this called?

11 votes

Cannot become ring because distribution law does not hold

10 votes
Accepted

Are There Always More Conjugacy Classes in the Kernel of a Morphism to $\Bbb Z_2$ than Not?

10 votes
Accepted

Did S. Lang prove Kuratowski–Zorn lemma without Axiom of choice or Well-ordering theorem?

10 votes
Accepted

Is a surjective immersion a submersion?

9 votes
Accepted

Must positive operators be self-adjoint on real vector space?

9 votes

How does the coefficient ring influence the Euler characteristic?

8 votes

Show by hand : $e^{e^2}>1000\phi$

7 votes

Is 𝐴 ∩ 𝒫(𝐴) = ∅ true for A = { 1 } ? Or is 𝐴 ∩ 𝒫(𝐴) = { 1 } ? (Set Theory)

7 votes
Accepted

Does this topology have a name?

7 votes

Is the symmetric group S3 a direct product of nontrivial groups?

7 votes
Accepted

Is $\operatorname{FinGrp}^{\operatorname{op}}$ a concrete category?

7 votes
Accepted

The gaussian integers modulo a pair of complex numbers

7 votes
Accepted

Showing that a group has infinite order

7 votes
Accepted

Structure Theorem for non-abelian finite groups or rings

7 votes
Accepted

Trying to determine $\mathbb{Z}[x] / (6, 2x - 1)$

7 votes

Prove there isn't a group $G$ that satisfy ${\rm Aut}(G) \cong \mathbb{Z}$

6 votes
Accepted

Simple minded details about why a particular map is étale

6 votes
Accepted

is it same thing to say that a group has a subgroup of order x or it has an element of order x

6 votes
Accepted

Products in a category

6 votes

How is the "Representation of Cosets theorem" a generalization of Cayley's theorem?

6 votes

Is the derivative of a periodic function always periodic?

6 votes

Does hom. $\phi$ from abelian $G$ to $H$ imply $G\cong \ker(\phi)\oplus{\rm im}(\phi)$?

6 votes
Accepted

Injectivity of the canonical map to the double dual

6 votes
Accepted

Can $({\Bbb N}, \max)$ be topologized to be a compact Hausdorff monoid?

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