160 reputation
5
bio website
location
age
visits member for 2 years, 5 months
seen 2 days ago

Dec
16
answered Eigenvalue inequalities for Hermitian matrices
Dec
15
answered Almost surely convergence of the sequence
Apr
11
comment Lower bound for divergence of matrix spectrum
Now it is better (however, you should replace $i + 1$ by $j$). But I don't know ways to estimate $\min_{i \ne j} |\lambda_i - \lambda_j|$ for a matrix in rather general form.
Apr
11
suggested rejected edit on Lower bound for divergence of matrix spectrum
Apr
11
revised Lower bound for divergence of matrix spectrum
added 4 characters in body
Apr
11
comment Lower bound for divergence of matrix spectrum
Thanks for suggestion. I will edit my question to make clear I want some $c > 0$.
Apr
11
comment Lower bound for divergence of matrix spectrum
Really, isn't helpful. It is a bound of the form $N c$.
Apr
11
revised Lower bound for divergence of matrix spectrum
Make notation clear
Apr
11
suggested approved edit on Lower bound for divergence of matrix spectrum
Apr
11
comment Finding expected value of variance estimator (sum expansion problem)
At the right hand side we expand mean at the left hand side. We have $n$ quadratic first, they are collected in the first sum. Cross-terms $\sum_{i \ne j} (X_i - \mu) (X_j - \mu) = 2 \sum_{i = 1}^{n - 1} \sum_{j > i} (X_i - \mu) (X_j - \mu)$ are collected in the second sum at the right hand side.
Apr
11
asked Lower bound for divergence of matrix spectrum
Jan
16
awarded  Supporter
Jan
2
awarded  Teacher
Dec
21
answered Logistic regression with weighted instances
Nov
12
accepted Quadratic functon integration over normal distribution
Nov
12
awarded  Editor
Nov
12
revised Quadratic functon integration over normal distribution
deleted 35 characters in body
Nov
12
answered Quadratic functon integration over normal distribution
Nov
7
asked Quadratic functon integration over normal distribution
Nov
2
awarded  Scholar