Theorem mpbirand 441

Description: Detach truth from conjunction in biconditional. (Contributed by Glauco Siliprandi, 3-Mar-2021.)

Hypotheses

Ref	Expression
mpbirand.1	⊢ (𝜑 → 𝜒)
mpbirand.2	⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃)))

Assertion

Ref	Expression
mpbirand	⊢ (𝜑 → (𝜓 ↔ 𝜃))

Proof of Theorem mpbirand

Step	Hyp	Ref	Expression
1		mpbirand.2	. 2 ⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃)))
2		mpbirand.1	. . 3 ⊢ (𝜑 → 𝜒)
3	2	biantrurd 305	. 2 ⊢ (𝜑 → (𝜃 ↔ (𝜒 ∧ 𝜃)))
4	1, 3	bitr4d 191	1 ⊢ (𝜑 → (𝜓 ↔ 𝜃))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117

This theorem is referenced by:  fprodssdc  11755  dvdsr2d  13651  lspsnel5  13965  txmetcn  14755