7

This number is a prime.

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The dimensions of irreducible modules of the exceptional Lie group G_2 are all congruent to {-1,0,+1} mod 7. A similar phenomenon occurs for all exceptional Lie groups and for some classical ones as well. [Rupinski]

Submitted: 2008-11-13 19:38:20;   Last Modified: 2008-11-15 16:07:32.
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