Sergio Parreiras's user avatar
Sergio Parreiras's user avatar
Sergio Parreiras's user avatar
Sergio Parreiras
  • Member for 11 years, 10 months
  • Last seen more than a week ago
17 votes
2 answers
844 views

Prove that determinant of a matrix (with polynomial entries) is non-zero

13 votes
2 answers
392 views

When differentiability of the product implies differentiability of the individual terms?

11 votes
1 answer
607 views

Effect of pullback of differential forms on an ideal

8 votes
0 answers
447 views

ODE system and Lie symmetries

7 votes
0 answers
426 views

Determinant of Matrix is Not Zero (combinatorial proof?)

6 votes
2 answers
275 views

Linear Algebra: System of Equations

6 votes
2 answers
2k views

How we compute expectation of a singular random variable?

5 votes
1 answer
324 views

Lie-brackets and solution space of PDE

4 votes
1 answer
123 views

Differentiability at a point $x$ with $f$ differentiable in $\mathbb R\backslash\{x\}$

4 votes
0 answers
91 views

Resultants and "look a like" polynomials, $p(x)=x^k$ with $k\in\mathbb{Q}_{+}$.

3 votes
0 answers
91 views

Limits of integral ratio: which theorems to use?

3 votes
0 answers
82 views

Inequality, symmetric function

3 votes
3 answers
562 views

Help with functional equation $F(x,x)+F(x,c-x)-F(c-x,x)-F(c-x,c-x)=0$

2 votes
1 answer
120 views

Uniqueness of the ODE solutions

2 votes
2 answers
334 views

OOP and category theory, any connections?

2 votes
2 answers
350 views

CAS for algebraic geometry, which one?

2 votes
1 answer
188 views

ODE system and single PDE "equivalence", reference request

2 votes
1 answer
304 views

Reducing size of ODE system by using symmetries: examples, references help request.

2 votes
1 answer
73 views

Help with Polynomial Roots Problem

2 votes
0 answers
61 views

Muirhead's Inequality (software?)

2 votes
0 answers
519 views

Stack of records theorem for $C^0$ functions?

2 votes
0 answers
48 views

Space generated by "look alike" polynomials, $x^k$ with $k\in\mathbb Q_{+}$

1 vote
2 answers
285 views

Dickson's Lemma (proof of Prop. 2.23 in Hasset's Intro to Alg Geom)

1 vote
2 answers
222 views

Classifying permutations in terms of their cycle notation

1 vote
0 answers
34 views

Stochastic Orders

1 vote
2 answers
232 views

Awodey's first UMP example

1 vote
1 answer
284 views

Non-decreasing and everywhere differentiable on $[0,1]$ implies absolutelly continuous?

1 vote
3 answers
7k views

Inverse gamma distribution

1 vote
1 answer
176 views

Conjugated priors (Pareto and Beta): Does this distribution have a name?

1 vote
1 answer
54 views

Bound on expectation of function of standard normal, $\mathbb{E}[\exp(Z^a)]$