(************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) (* ~(x<>y). Hints Immediate eq_not_neq : num. Axiom neq_sym : (x,y:N)(x<>y)->(y<>x). Hints Resolve neq_sym : num. Axiom neq_not_neq_trans : (x,y,z:N)(x<>y)->~(y<>z)->(x<>z). Hints Resolve neq_not_neq_trans : num.