Metamath Proof Explorer


Theorem mdandyvrx1

Description: Given the exclusivities set in the hypotheses, there exist a proof where ch, th, ta, et exclude ze, si accordingly. (Contributed by Jarvin Udandy, 7-Sep-2016)

Ref Expression
Hypotheses mdandyvrx1.1 ⊢ φ ⊻ ζ
mdandyvrx1.2 ⊢ ψ ⊻ σ
mdandyvrx1.3 ⊢ χ ↔ ψ
mdandyvrx1.4 ⊢ θ ↔ φ
mdandyvrx1.5 ⊢ τ ↔ φ
mdandyvrx1.6 ⊢ η ↔ φ
Assertion mdandyvrx1 ⊢ χ ⊻ σ ∧ θ ⊻ ζ ∧ τ ⊻ ζ ∧ η ⊻ ζ

Proof

Step Hyp Ref Expression
1 mdandyvrx1.1 ⊢ φ ⊻ ζ
2 mdandyvrx1.2 ⊢ ψ ⊻ σ
3 mdandyvrx1.3 ⊢ χ ↔ ψ
4 mdandyvrx1.4 ⊢ θ ↔ φ
5 mdandyvrx1.5 ⊢ τ ↔ φ
6 mdandyvrx1.6 ⊢ η ↔ φ
7 2 3 axorbciffatcxorb ⊢ χ ⊻ σ
8 1 4 axorbciffatcxorb ⊢ θ ⊻ ζ
9 7 8 pm3.2i ⊢ χ ⊻ σ ∧ θ ⊻ ζ
10 1 5 axorbciffatcxorb ⊢ τ ⊻ ζ
11 9 10 pm3.2i ⊢ χ ⊻ σ ∧ θ ⊻ ζ ∧ τ ⊻ ζ
12 1 6 axorbciffatcxorb ⊢ η ⊻ ζ
13 11 12 pm3.2i ⊢ χ ⊻ σ ∧ θ ⊻ ζ ∧ τ ⊻ ζ ∧ η ⊻ ζ