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 mg.metric-geometry
Search options not deleted
user 26349
Euclidean, hyperbolic, discrete, convex, coarse geometry, metric spaces, comparisons in Riemannian geometry, symmetric spaces.
9
votes
Accepted
Riemannian distance functions on the real line
[Moved from the comments/chat.]
Define $D(x)$ by
$$
\begin{align*}
D(x) =
\begin{cases}
d(0,x), & \text{ if } x\geq 0;\\
-d(x,0), & \text{ if } x< 0.
\end{cases}
\end{align*}
$$
Function $D(x)$ is n …
- 726
17
votes
Accepted
Efficiently determine if convex hull contains the unit ball
The problem is NP hard. Here is a proof sketch.
The problem is to determine if there is a point $y$ with $\|y\|=1$ outside of the convex hull of given points $x_1,\dots, x_n$. Note that such point e …
- 726