Search Results
| 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 positivity
Search options answers only
not deleted
user 42278
5
votes
Nonnegative coefficients of a product of polynomials
If however, as I suspect, there is no algorithm (to decide strict positivity on an orthant), then there is a problem. …
- 4,679
8
votes
Accepted
One of Poincaré's theorems about positive rational functions
For the more general problem, given $P$ with nonnegative coefficients, and $f$, iff conditions for there to be $n$ such that $P^n f$ has no negative coefficients are given in Deciding eventual positivity … Positivity at the zero-dimensional faces comes for free from $f > 0$ on the positive orthant. …
- 4,679
17
votes
Accepted
When can a function be made positive by averaging?
A fine variation is given in Deciding eventual positivity of polynomials, Ergodic theory and dynamical systems
(1986) 6, 57-79, which determines, given $P$ with no negative coefficients, when there exists …
- 4,679