Theorem a2i 11

Description: Inference derived from Axiom ax-2 7. (Contributed by NM, 5-Aug-1993.)

Hypothesis

Ref	Expression
a2i.1	⊢ (𝜑 → (𝜓 → 𝜒))

Assertion

Ref	Expression
a2i	⊢ ((𝜑 → 𝜓) → (𝜑 → 𝜒))

Proof of Theorem a2i

Step	Hyp	Ref	Expression
1		a2i.1	. 2 ⊢ (𝜑 → (𝜓 → 𝜒))
2		ax-2 7	. 2 ⊢ ((𝜑 → (𝜓 → 𝜒)) → ((𝜑 → 𝜓) → (𝜑 → 𝜒)))
3	1, 2	ax-mp 5	1 ⊢ ((𝜑 → 𝜓) → (𝜑 → 𝜒))

Syntax hints:   → wi 4

This theorem was proved from axioms:  ax-mp 5  ax-2 7

This theorem is referenced by:  imim2i  12  mpd  13  sylcom  28  pm2.43  53  ancl  318  ancr  321  anc2r  328  pm2.65  660  pm2.18dc  856  con4biddc  858  hbim1  1581  sbcof2  1821  ralimia  2555  ceqsalg  2788  rspct  2857  elabgt  2901  fvmptt  5649  ordiso2  7094  bj-exlimmp  15261  bj-rspgt  15278  bj-indint  15423