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Proof step 2 from proof middle-coef-not-one (previous step)

binom_coef(2 * i, i) = 1, 0 < i ⊦

User applied rule insert lemma

And obtained the following new goals

Proof step 3:
⊦ 0 < i → ¬ binom_coef(2 * i, i) < 2
Proof step 4:
0 < i → ¬ binom_coef(2 * i, i) < 2, binom_coef(2 * i, i) = 1, 0 < i ⊦

Rule argument

spec: inst: name: middle-coef-not-one-01 seq: ⊦ 0 < i → ¬ binom_coef(2 * i, i) < 2 subst: [i] → [i] flags: current, []

Additional information

Used terms: i