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Questions
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Dual concept for the p-primary component

feb 23 at 11:43 Simone Virili 755●1●11

 
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An equivalence relation on the power set of the plane.

feb 1 12 at 22:41 Robert Israel 10.9k●8●23

 
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Tangent lines to 2 circles, tangent planes to 3 spheres, and so on.

jan 31 12 at 6:33 Noam D. Elkies 19.6k●4●65●98

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An algorithm for constructing the AR-quiver of a path algebra corresponding to a change in the orientation.

jan 29 12 at 5:00 Steve 1,016●1●5●16

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The functor category Funct(R-Mod, S-Mod)

jan 28 12 at 14:16 Rogelio Fernández-Alonso 83●5