Theorem syl2an2r 559

Description: syl2anr 284 with antecedents in standard conjunction form. (Contributed by Alan Sare, 27-Aug-2016.)

Hypotheses

Ref	Expression
syl2an2r.1	⊢ (𝜑 → 𝜓)
syl2an2r.2	⊢ ((𝜑 ∧ 𝜒) → 𝜃)
syl2an2r.3	⊢ ((𝜓 ∧ 𝜃) → 𝜏)

Assertion

Ref	Expression
syl2an2r	⊢ ((𝜑 ∧ 𝜒) → 𝜏)

Proof of Theorem syl2an2r

Step	Hyp	Ref	Expression
1		syl2an2r.1	. . 3 ⊢ (𝜑 → 𝜓)
2		syl2an2r.2	. . 3 ⊢ ((𝜑 ∧ 𝜒) → 𝜃)
3		syl2an2r.3	. . 3 ⊢ ((𝜓 ∧ 𝜃) → 𝜏)
4	1, 2, 3	syl2an 283	. 2 ⊢ ((𝜑 ∧ (𝜑 ∧ 𝜒)) → 𝜏)
5	4	anabss5 542	1 ⊢ ((𝜑 ∧ 𝜒) → 𝜏)

Syntax hints:   → wi 4   ∧ wa 102

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106

This theorem depends on definitions:  df-bi 115

This theorem is referenced by:  op1stbg  4228  supelti  6415  supmaxti  6417  infminti  6440  divalglemnqt  10320  lcmid  10462