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jspecter
  • Member for 12 years, 10 months
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32 votes
Accepted

Proving that an additive function $f$ is continuous if it is continuous at a single point

25 votes
Accepted

What to self-study, after studying AP Calculus BC and finishing Rudin's Principles of Mathematical Analysis?

24 votes
Accepted

Proving that a polynomial is irreducible over a field

21 votes
Accepted

Probability of a random $n \times n$ matrix over $\mathbb F_2$ being nonsingular

20 votes
Accepted

If $A$ is a Dedekind domain and $I \subset A$ a non-zero ideal, then every ideal of $A/I$ is principal.

19 votes

What infinity is greater than the continuum? Show with an example

16 votes

Completeness and Cauchy Sequences

15 votes

Existence of subgroup of order six in $A_4$

12 votes
Accepted

Minimal free resolution

12 votes

Can "being differentiable" imply "having continuous partial derivatives"?

12 votes
Accepted

Intersection of prime ideals

12 votes
Accepted

Exercise in Hartshorne

11 votes

Does a finite commutative ring necessarily have a unity?

10 votes
Accepted

Rationals are not locally compact and compactness

10 votes

Bernoulli's representation of Euler's number, i.e $e=\lim \limits_{x\to \infty} \left(1+\frac{1}{x}\right)^x $

10 votes
Accepted

Decomposing left regular representation of cyclic group over $\mathbb{Q}$

10 votes

Solve $x^3 +1 = 2y^3$

10 votes
Accepted

Is every submodule of a free module of finite rank finitely generated?

10 votes
Accepted

A group of order $195$ has an element of order $5$ in its center

9 votes
Accepted

Subrings of finite index and units

9 votes

Why is $f(x) = x\phi(x)$ injective, i.e. $x\phi(x) = y\phi(y)\Rightarrow x = y$

9 votes
Accepted

Uncertainty in the definition of "Dual Group"?

9 votes

Questions about a group with an index 4 normal subgroup

8 votes

Entire functions such that $f(z^{2})=f(z)^{2}$

8 votes
Accepted

How to show that the group of nonzero real numbers under multiplication is not isomorphic to the group of real numbers under addition?

8 votes
Accepted

Dihedral Group - isomorphism

8 votes
Accepted

Prove that $\zeta (4)\le 1.1$

8 votes
Accepted

Some intuitive vision on abstract algebra

7 votes

What does degree of an isogeny mean?

7 votes
Accepted

Commutator of a particular group product