Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 5371

for questions involving inequalities, upper and lower bounds.

69 votes
Accepted

Determinant of sum of positive definite matrices

latter inequality is equivalent to the fact that the function $A\mapsto(\det A )^{1/n}$ is concave on the set of $n\times n$ non-negative Hermitian matrices (see e.g., A Survey of Matrix Theory and Matrix Inequalities
Community's user avatar
  • 1
3 votes

Examples of inequality implied by equality.

.$$ The proof can be found in Inequalities by Beckenbach and Bellman. The isoperimetric inequality. …
Andrey Rekalo's user avatar
70 votes
Accepted

Why do we care about $L^p$ spaces besides $p = 1$, $p = 2$, and $p = \infty$?

Huge chunks of the theory of nonlinear PDEs rely critically on analysis in $L^p$-spaces. Let's take the 3D Navier-Stokes equations for example. Leray proved in 1933 existence of a weak solution to …
Andrey Rekalo's user avatar