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[v_4,l_4]=?, v_4 is the Hopf map in \pi_7(S^4) and l_4 is the generator of \pi_4(S^4)

homotopy-theory

mar 25 12 at 20:22 MathOverflow♦ 1●2●3

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is $\pi_k(X_1,A_1)$ a direct summand of $\pi_{k}(X_1\vee X_2,A_1\vee A_2)$

homotopy-theory

oct 7 at 15:44 Ronnie Brown 5,209●17●20

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