Corollary 2.3, p. 14 — group morphisms H #^f_α G → H #^{f′}_{α′} G correspond bijectively to quadruples (u, r, v, s)

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Corollary 2.3, p. 14 — group morphisms H #^f_α G → H #^{f′}_{α′} G correspond bijectively to quadruples (u, r, v, s) · Prove2Me