Set: pp::colors
Set: pp::unicode
Assumed: g
Assumed: a
Assumed: b
Assumed: H1
Assumed: H2
Proved: T1
Axiom H2 : (g a) > 0
Theorem T1 : (g b) > 0 := SubstP (λ x : ℤ, (g x) > 0) H2 H1