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15 votes
2 answers
583 views

Is there a fundamental problem with extending matrix concepts to tensors?

13 votes
1 answer
325 views

How can a non-mathematician intuitively understand the importance of algebraic varieties?

6 votes
2 answers
2k views

Eigenvalue of rank 2 matrix

5 votes
2 answers
9k views

Why can't an improper transfer function be realized?

5 votes
2 answers
792 views

Recovering minimum norm control from LQR theory

4 votes
1 answer
107 views

Second order sufficiency test for multivariable function

4 votes
0 answers
324 views

Representing a point in the convex hull

4 votes
1 answer
492 views

Can the limit of a sequence of matrices of fixed rank have higher rank?

3 votes
0 answers
193 views

About eigenvectors of sorted skew-symmetric Toeplitz matrices

3 votes
0 answers
278 views

Formula for area between a curve and it's chord

3 votes
1 answer
674 views

Randomly generate Hurwitz matrices?

3 votes
1 answer
2k views

Almost sure convergence and equivalent definition

3 votes
0 answers
105 views

Relationship (if any) between h-principle and homotopy analysis method

2 votes
1 answer
106 views

Commensurability for vector spaces

2 votes
3 answers
865 views

Existence of continous functional over infinite dimensional space without global minimum

2 votes
2 answers
75 views

Is this inequality true? $ (nk)! \ge n^k \cdot k! $

1 vote
0 answers
44 views

Name of a particular kind of identity block matrices

1 vote
1 answer
168 views

Converting constrained Lagrangian to Hamiltonian form

1 vote
1 answer
428 views

Existence of convex combination with no coefficient zero

1 vote
1 answer
330 views

Does continuity in one variable and locally Lipschitz in another imply uniformity in the first?

0 votes
1 answer
1k views

Does locally Lipschitz in one variable imply uniformly Lipschitz in another?

0 votes
1 answer
221 views

Complex differential equation that has all solutions complex

0 votes
1 answer
302 views

Simple proof of when minimal polynomial coincides with the characteristic polynomial

0 votes
1 answer
59 views

Trouble understanding proof using inner product

0 votes
1 answer
145 views

Singular perturbation theory in non-standard form

0 votes
0 answers
50 views

Eigenvalues when perturbed along anti-diagonal.