BETA* is a top-level command.
Rule to infer a line from one which is equal up to lambda conversion
using beta rule (but NOT eta rule) and alphabetic change of bound variables.
The command format for BETA* is:

 <n>BETA*   D1   D2    B    A     D1-HYPS    D2-HYPS 

The arguments have the following meaning:
D1 : Lower Line
D2 : Higher Line
B : Wff on Higher Line
A : Wff on Lower Line
D1-HYPS : Hypotheses
D2-HYPS : Hypotheses

ETPS documentation homepage


BETA* is an inference rule.
Its priority is NIL

ETPS documentation homepage

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