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# 199 Questions

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### Friend B and C have eaten zero apples. How many more apples has C eaten?

dec 3 at 11:51 Kasper 4,550

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### No rigorous proofs from 200 B.C to 1870?

jan 24 '15 at 23:22 Kasper 4,550
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### Let $A''=\operatorname{End}_{A'}(V)=\operatorname{End}_{\operatorname{End}_A(V)}(V)$. Show that $A''$ is a $k$-algebra.

oct 17 '14 at 14:55 Kasper 4,550

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### Using upshape (non-italic) variables in mathematics

oct 9 '14 at 11:54 Kasper 4,550
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### Let $V=V_{1}⊕ ⋯ ⊕ V_{n}$ be semisimple. $U$ irreducible. Show that $\dim_{k} (Hom_A(U,V))$ is equal to the number of $V_i$ equivalent to $U$.

oct 5 '14 at 10:02 Kasper 4,550

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### Remark 3.1.3 from Introduction to Representation Theory from Pavel Etingof

oct 3 '14 at 11:42 Kasper 4,550

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