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Aaron's user avatar
Aaron's user avatar
Aaron
  • Member for 12 years, 10 months
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42 votes
1 answer
1k views

What does the space of non-diagonalizable matrices look like?

39 votes
2 answers
2k views

Is there a clever solution to this elementary probability/combinatorics problem?

29 votes
2 answers
3k views

A constrained topological sort?

17 votes
3 answers
4k views

When does a SES of vector bundles split?

14 votes
3 answers
4k views

A proof of the product rule using the single variable chain rule?

12 votes
1 answer
1k views

Find conjugation invariant functions without using eigenvalues?

11 votes
0 answers
2k views

Does finite projective resolution imply finite free resolution?

8 votes
2 answers
2k views

Maps between Eilenberg–MacLane spaces

5 votes
2 answers
483 views

Tiling arbitrarily large portions of the plane implies tiling the plane?

5 votes
2 answers
780 views

Is the intersection of finite index subfields finite?

5 votes
1 answer
2k views

When does a real matrix have a real square root?

5 votes
0 answers
101 views

When are u and 1-u never both units?

5 votes
2 answers
169 views

A Fibonacci identity and $f(Av)=\det(A)f(v)$

5 votes
1 answer
118 views

When does $e^{hD}$ give a well defined operator on analytic functions?

5 votes
0 answers
88 views

Finding the order of a 2x2 matrix mod n when n is NOT prime

3 votes
1 answer
281 views

Projection matrices with constant diagonal

3 votes
2 answers
57 views

Non-inductive solution to this probability riddle?

3 votes
1 answer
196 views

Pullback of representations along the Cayley embedding?

3 votes
2 answers
122 views

Conceptual approach to the formula $\sum_{i=1}^n \det(v_1, \ldots, Av_i, \ldots, v_n)=\text{tr}(A)\det(v_1, \ldots, v_n)$

3 votes
0 answers
243 views

When is a monic endomorphism epic?

3 votes
1 answer
828 views

What is the image of operator exponential?

3 votes
0 answers
830 views

Integrating angular velocity to obtain orientation

3 votes
1 answer
65 views

Probability that $4A+2B+C$ is a multiple of $8$ (better proof)

2 votes
0 answers
142 views

Determining properties of the coefficients of a Taylor series

2 votes
1 answer
79 views

How big can a subspace of $U\otimes V$ be if it contains no non-zero "pure" tensors?

2 votes
0 answers
67 views

Reconstructing paths on the sphere from the ratio of acceleration to velocity

2 votes
0 answers
73 views

Difficulties with the "correspondence" between essential singularities and formal Laurent series

1 vote
1 answer
62 views

Different approaches for this problem (number in different bases)

1 vote
1 answer
315 views

Coordinate free proof of height of intersection of two triangles with common base

1 vote
1 answer
224 views

Moving tensor products inside homs