Theorem anxordi 1291

Description: Conjunction distributes over exclusive-or. (Contributed by Mario Carneiro and Jim Kingdon, 7-Oct-2018.)

Assertion

Ref	Expression
anxordi	⊢ ((𝜑 ∧ (𝜓 ⊻ 𝜒)) ↔ ((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒)))

Proof of Theorem anxordi

Step	Hyp	Ref	Expression
1		simpl 102	. 2 ⊢ ((𝜑 ∧ (𝜓 ⊻ 𝜒)) → 𝜑)
2		df-xor 1267	. . . 4 ⊢ (((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒)) ↔ (((𝜑 ∧ 𝜓) ∨ (𝜑 ∧ 𝜒)) ∧ ¬ ((𝜑 ∧ 𝜓) ∧ (𝜑 ∧ 𝜒))))
3	2	simplbi 259	. . 3 ⊢ (((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒)) → ((𝜑 ∧ 𝜓) ∨ (𝜑 ∧ 𝜒)))
4		simpl 102	. . . 4 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
5		simpl 102	. . . 4 ⊢ ((𝜑 ∧ 𝜒) → 𝜑)
6	4, 5	jaoi 636	. . 3 ⊢ (((𝜑 ∧ 𝜓) ∨ (𝜑 ∧ 𝜒)) → 𝜑)
7	3, 6	syl 14	. 2 ⊢ (((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒)) → 𝜑)
8		ibar 285	. . 3 ⊢ (𝜑 → ((𝜓 ⊻ 𝜒) ↔ (𝜑 ∧ (𝜓 ⊻ 𝜒))))
9		ibar 285	. . . 4 ⊢ (𝜑 → (𝜓 ↔ (𝜑 ∧ 𝜓)))
10		ibar 285	. . . 4 ⊢ (𝜑 → (𝜒 ↔ (𝜑 ∧ 𝜒)))
11	9, 10	xorbi12d 1273	. . 3 ⊢ (𝜑 → ((𝜓 ⊻ 𝜒) ↔ ((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒))))
12	8, 11	bitr3d 179	. 2 ⊢ (𝜑 → ((𝜑 ∧ (𝜓 ⊻ 𝜒)) ↔ ((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒))))
13	1, 7, 12	pm5.21nii 620	1 ⊢ ((𝜑 ∧ (𝜓 ⊻ 𝜒)) ↔ ((𝜑 ∧ 𝜓) ⊻ (𝜑 ∧ 𝜒)))

Syntax hints:  ¬ wn 3   ∧ wa 97   ↔ wb 98   ∨ wo 629   ⊻ wxo 1266

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630

This theorem depends on definitions:  df-bi 110  df-xor 1267

This theorem is referenced by:  rpnegap  8615