Report copyright - 3/4 X X 1/4 1/2 a(2(1+u)t) a a b(4t-2(1-u/2)) u u a a b b c c b b c c c(4(1-u/2)t-3+2u) Homotopie entre les lacets a * (b * c) et (a * b) * c. Le paramètre
Please pass captcha verification before submit form
Please pass captcha verification before submit form