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7

Apr 10

+5	11:06	upvote	Why translation of vectors doesn't preserve the cosinus of the angle they form?
+2	10:08	accept	Is there any difference between the definition of a commutative ring and field?
-2	00:39	downvote	Is there any difference between the definition of a commutative ring and field?
+2	00:39	undownvote	Is there any difference between the definition of a commutative ring and field?

5

Apr 9

+5

23:08

upvote

Is there any difference between the definition of a commutative ring and field?

10

Feb 26

+10	13:07	upvote	Prove $ \frac{0}{N} + \frac{1}{N} + \ldots + \frac{q-1}{N} =\frac{q(q-1)}{2N}$
+2	10:56	accept	Prove $ \frac{0}{N} + \frac{1}{N} + \ldots + \frac{q-1}{N} =\frac{q(q-1)}{2N}$
-2	10:41	downvote	Prove $ \frac{0}{N} + \frac{1}{N} + \ldots + \frac{q-1}{N} =\frac{q(q-1)}{2N}$

100

Nov 26 '12

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Jun 27 '12

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