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 examples
Search options not deleted
user 1924
For questions requesting examples of a certain structure or phenomenon
155
votes
Proofs without words
This is elementary as well, but one of my favorite ones :)
$1^2 + 2^2 + \dots + n^2 = \frac13n(n+1)(n+\frac12)$
(Author: Man-Keung Siu)
31
votes
Proofs without words
As you probably already know — there are lots of these in Proofs without Words (and II) by Roger Nelson.
3
votes
Fundamental Examples
Theorem on Friends and strangers in Ramsey Theory.