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Nov 19, 2015 at 15:14 comment added Denis Serre @auniket. That was a shortcoming. I meant the image of $M_2({\mathbb R})^r$, when $r=2$ or $3$.
Nov 19, 2015 at 12:56 comment added pinaki How do you get a map from $M_2(\mathbb{R})$ to itself via $S_2$? Do you fix one of the factors?
Nov 19, 2015 at 11:04 history edited Denis Serre CC BY-SA 3.0
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Nov 4, 2010 at 11:06 history edited Denis Serre
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Nov 4, 2010 at 10:06 history asked Denis Serre CC BY-SA 2.5