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Theorem fac-rec

⊦ 0 < i → fac(i) = i * fac(i - 1)

Type: An axiom
Validity: The proof is valid.
Features:
Comment:
Used by: coef-fac-divides, coef-fac-divides-h, coef-mult-rec, coef-mult-rec-lower, coef-one, coef-pred-01, coef-rec-add-01, coef-sub-mult, coef-succ, fac-add, fac-le, fac-le-one, fac-not-neg, fac-one, fac-pos-01, max_exp-fac-01, max_exp-fac-rec, max_exp-fac-same, max_exp-fac-smaller, prime-fac-divides, prime-fac-divides-01, prime-fac-divides-not,
Used by units in proved state:
Proof exists?: No