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;"> <span style="font-size: 200%">'''Welcome to the AoPS Wiki!'''</span>
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__NOTOC__  __NOEDITSECTION__  <div class="frontlink" style="background-color:#1b365d; color:#ffffff; font-size: 110%; padding-left:15px; padding-right:15px; padding-bottom:10px;"> <span style="font-size: 200%">'''Welcome to the AoPS Wiki!'''</span>
 
   
 
   
 
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.  
 
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.  
 
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<div class="frontlink" style="background-color:darkred; color:#ffffff; padding: 10px; margin: 10px 0;">The wiki is currently not editable. It is currently scheduled to be editable again on November 21, but this date is subject to change.  
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<div style="background-color:darkred;padding:10px;color:white;text-align:center;margin-top:10px;display:none">
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During AMC testing week, the AoPS Wiki is in read-only mode. No edits can be made.  
 
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    <div style="height:calc(100% - 10px);background-color:#fff; overflow:hidden; margin:10px 5px 0 0;">
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      {{topics}}
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    <div style="min-height: 160px; max-height: 260px;background-color:#fff; overflow:hidden; margin:10px auto 10px 5px;">
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      {{weeklyproblem}}
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<div style="float:left; width:calc(50% - 10px); min-height: 367px; max-height: 584px;  position: relative; background-color:#fff; box-shadow: 2px 2px 6px #ccc; overflow:hidden; margin-left: 5px;  margin-right:5px; margin-bottom:10px; margin-top: 10px">
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{{topics}}
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      {{recentchanges}}
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{{weeklyproblem}}
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<h2 style="border-bottom: 1px solid; color: #1b365d;">New to the AoPS Wiki?</h2>
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<div style="float:right; width:calc(50% - 5px); min-height: 192px; max-height: 370px;  position: relative; background-color:#fff; box-shadow: 2px 2px 6px #ccc; overflow:hidden; margin-left:5px; margin-bottom:10px; margin-top: 5px;">
 
{{recentchanges}}
 
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<div style="clear:both;"></div>
 
 
<div style="background-color:#ffffff; border-top:10px solid #204079; box-shadow: 2px 2px 6px #ccc; padding:0.5em; margin-left: 5px; padding-top: 0px;">
 
<h2 style="margin:5px 0px 0px 0px;border-bottom: 1px solid; color: #20458c;">New to the AoPS Wiki?</h2>
 
 
   
 
   
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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If you don't know much about how to edit a wiki, you might want to read the [[AoPS_Wiki:Tutorial|tutorial]] and the [[Help:Contents|help files]]. You can also read [[AoPS_Wiki:What AoPSWiki is not|what AoPSWiki is not]]. Lastly, please read the [[AoPS_Wiki:Policy|policies]] of the AoPSWiki before editing, and [[AoPS_Wiki:What makes AoPSWiki different|why AoPSWiki is different from other online resources]].
 
   
 
   
 
AoPSWiki runs on the [[MediaWiki]] software.
 
AoPSWiki runs on the [[MediaWiki]] software.
 
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Latest revision as of 13:22, 13 November 2024

During AMC testing week, the AoPS Wiki is in read-only mode. No edits can be made.

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.