Ted

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228 Answers

newest activity votes
28
Solutions to the matrix equation $\mathbf{AB-BA=I}$ over general fields
jan 15 '12 at 4:09
24
Why don't we define “imaginary” numbers for every “impossibility”?
dec 16 at 0:40
13
What is the difference between Completeness and Soundness in first order logic?
feb 4 '12 at 9:17
13
Is there a classification of local rings with trivial group of units?
sep 23 '11 at 7:18
12
Is it true that $(\mathbb{C}[x,y]/(xy))_{(x,y-k)}=\mathbb{C}[t]_{(t)}$?
sep 22 at 18:53
10
For any $n$, $G^\dot{n}$ is a subgroup of $G$. Is $G$ abelian?
feb 11 at 1:08
10
Why the emphasis on Projective Space in Algebraic Geometry?
nov 24 '11 at 23:56
9
What's the intuition behind non-integer exponents/powers
dec 4 at 4:24
9
Addition and multiplication in a Galois Field
dec 9 '11 at 4:37
7
If a group $G$ has only finitely many subgroups, then show that $G$ is a finite group.
mar 6 at 16:53
7
What is the analytic continuation of a multifactorial?
feb 1 at 4:35
7
Request for a proof of the following continued-fraction identity
jan 6 at 5:10
7
Eisenstein and Quadratic Reciprocity as a consequence of Artin Reciprocity, and Composition of Reciprocity Laws
dec 26 at 18:07
7
Showing that a homogenous ideal is prime.
jul 20 '12 at 7:41
6
does number adding order affects to the final sum?
mar 24 at 9:30
6
What's a proof that the angles of a triangle add up to 180°?
jan 3 at 18:33
6
Why is the determinant of a symplectic matrix 1?
nov 21 at 17:03
6
Using setminus notation with set elements
may 6 '12 at 2:08
6
Why does this FSM accept binary numbers divisible by three?
may 3 '12 at 7:04
6
Is there any motivation for Zorn's Lemma?
apr 10 '12 at 9:10
6
In Satisfiability, what is the difference between the empty clause and the empty set?
jan 3 '12 at 15:46
6
If a $p$-Sylow subgroup is in the normalizer of another, they're equal?
sep 12 '11 at 5:25
5
Lie bracket on vector fields
feb 3 at 22:09
5
Analytic functions branch
jan 29 at 5:50
5
Does there exist a non-trivial, associative Lie algebra?
jan 26 at 7:51
5
Every automorphism of a tree with an odd number of vertices has a fixed point
oct 7 at 21:11
5
Sum of infinite series and polynomial equation
jan 17 '12 at 3:41
5
Number of subgroups of prime order
jan 9 '12 at 0:03
5
Define a Principal Branch in Complex Analysis
oct 21 '11 at 5:25
5
$CA=BC$ iff $A$ and $B$ have a common eigenvalue
aug 30 '11 at 4:04
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