Theorem wl-3xorbi123d 38318

Description: Equivalence theorem for triple xor. (Contributed by Mario Carneiro, 4-Sep-2016.) df-had redefined. (Revised by Wolf Lammen, 24-Apr-2024.)

Hypotheses

Ref	Expression
wl-3xorbid.1	⊢ (𝜑 → (𝜓 ↔ 𝜒))
wl-3xorbid.2	⊢ (𝜑 → (𝜃 ↔ 𝜏))
wl-3xorbid.3	⊢ (𝜑 → (𝜂 ↔ 𝜁))

Assertion

Ref	Expression
wl-3xorbi123d	⊢ (𝜑 → (hadd(𝜓, 𝜃, 𝜂) ↔ hadd(𝜒, 𝜏, 𝜁)))

Proof of Theorem wl-3xorbi123d

Step	Hyp	Ref	Expression
1		wl-3xorbid.1	. . . 4 ⊢ (𝜑 → (𝜓 ↔ 𝜒))
2		wl-3xorbid.2	. . . 4 ⊢ (𝜑 → (𝜃 ↔ 𝜏))
3	1, 2	bibi12d 348	. . 3 ⊢ (𝜑 → ((𝜓 ↔ 𝜃) ↔ (𝜒 ↔ 𝜏)))
4		wl-3xorbid.3	. . 3 ⊢ (𝜑 → (𝜂 ↔ 𝜁))
5	3, 4	bibi12d 348	. 2 ⊢ (𝜑 → (((𝜓 ↔ 𝜃) ↔ 𝜂) ↔ ((𝜒 ↔ 𝜏) ↔ 𝜁)))
6		wl-3xorbi2 38317	. 2 ⊢ (hadd(𝜓, 𝜃, 𝜂) ↔ ((𝜓 ↔ 𝜃) ↔ 𝜂))
7		wl-3xorbi2 38317	. 2 ⊢ (hadd(𝜒, 𝜏, 𝜁) ↔ ((𝜒 ↔ 𝜏) ↔ 𝜁))
8	5, 6, 7	3bitr4g 317	1 ⊢ (𝜑 → (hadd(𝜓, 𝜃, 𝜂) ↔ hadd(𝜒, 𝜏, 𝜁)))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209  haddwhad 1623

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-ifp 1079  df-xor 1542  df-tru 1573  df-had 1624

This theorem is used by:  wl-3xorbi123i  38319