This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer


Theorem iin3

Description: in3 without virtual deduction connectives. Special theorem needed for the Virtual Deduction translation tool. (Contributed by Alan Sare, 23-Jul-2011) (Proof modification is discouraged.) (New usage is discouraged.)

Ref Expression
Hypothesis iin3.1
|- ( ph -> ( ps -> ( ch -> th ) ) )
Assertion iin3
|- ( ph -> ( ps -> ( ch -> th ) ) )

Proof

Step Hyp Ref Expression
1 iin3.1
 |-  ( ph -> ( ps -> ( ch -> th ) ) )