Difference between revisions of "Main Page"

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__NOTOC__ __NOEDITSECTION__  <div class="frontlink" style="background-color:#204079; color:#ffffff; font-size: 110%; padding-left:15px; padding-right:15px; padding-bottom:10px;  margin-left: 5px; box-shadow: 2px 2px 6px #ccc;"> <span style="font-size: 200%">'''Welcome to the AoPS Wiki!'''</span>
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The AoPS Wiki project is administered by the [[Art_of_Problem_Solving|<span style="color:#83a1d6;">Art of Problem Solving</span>]] for supporting educational content useful to avid math students.  Since it is a wiki, it is publicly editable – any of our users can contribute!
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{{topics}}
 
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Welcome to the AoPSWiki! The AoPSWiki is a wiki (or a publicly editable online resource) project administered by the [[Art of Problem Solving]] for supporting educational content useful to avid math students. Unlike most online resources, the AoPSWiki is meant to be easily readable by even the least advanced student. Also, the AoPSWiki, being a wiki, can be edited by anyone!
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<h2 style="margin:5px 0px 0px 0px;border-bottom: 1px solid; color: #20458c;">New to the AoPS Wiki?</h2>
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If you don't know much about how to edit a wiki, you might want to read the [[AoPSWiki:Tutorial|tutorial]] and the [[Help:Contents|help files]]. You can also read [[AoPSWiki:What AoPSWiki is not|what AoPSWiki is not]]. Lastly, please read the [[AoPSWiki:Policy|policies]] of the AoPSWiki before editing, and [[AoPSWiki:What makes AoPSWiki different|why AoPSWiki is different from other online resources]].
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AoPSWiki runs on the [[MediaWiki]] software.
 
AoPSWiki runs on the [[MediaWiki]] software.
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===Getting Started===
 
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If you don't know much about how to edit a wiki, you might want to read the [[AoPSWiki:Tutorial | tutorial]] and the [[Help:Contents|help files]]. You can also read [[AoPSWiki:What AoPSWiki is not|what AoPSWiki is not]].
 
 
 
Lastly, please read the [[AoPSWiki:Policy|policies]] of the AoPSWiki before editing, and [[AoPSWiki:What makes AoPSWiki different|why AoPSWiki is different from other online resources]].
 
 
 
Also, here are some tasks you can do if you want to help out on the AoPSWiki:
 
* Write/edit articles.
 
* Upload an image. ([[Help:Images|Learn how]])
 
* Add information useful to students of [[problem solving]].
 
* [[AoPSWiki:Site support|Support the AoPSWiki]].
 
* Let others know about the AoPSWiki.
 
 
 
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[[Category:AoPSWiki]]
 

Revision as of 12:34, 2 March 2015

Problem of the Week

1983 AIME, Problem 13

For $\{1, 2, 3, \ldots, n\}$ and each of its non-empty subsets a unique alternating sum is defined as follows. Arrange the numbers in the subset in decreasing order and then, beginning with the largest, alternately add and subtract successive numbers. For example, the alternating sum for $\{1, 2, 3, 6,9\}$ is $9-6+3-2+1=5$ and for $\{5\}$ it is simply $5$. Find the sum of all such alternating sums for $n=7$.


New to the AoPS Wiki?

If you don't know much about how to edit a wiki, you might want to read the tutorial and the help files. You can also read what AoPSWiki is not. Lastly, please read the policies of the AoPSWiki before editing, and why AoPSWiki is different from other online resources.

AoPSWiki runs on the MediaWiki software.