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Proof step 2 from proof coef-same-01 (previous step)

0 < j ⊦ binom_coef(j, j) = 1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ 0 ≤ j → binom_coef(j, j) = 1

Rule argument

spec: int-fac inst: name: coef-same seq: ⊦ 0 ≤ j → binom_coef(j, j) = 1 subst: [j] → [j] flags: rewrite, current

Additional information

Used simplifier rules: lels-01: ⊦ ¬ i ≤ j ↔ j < i; from specification int-abs%ls-01: ⊦ i < j → ¬ j < i; from specification int-basic1 Used terms: j