ALPHA : term -> term -> thm

SYNOPSIS
Proves equality of alpha-equivalent terms.

DESCRIBE
When applied to a pair of terms t1 and t1' which are alpha-equivalent, ALPHA returns the theorem |- t1 = t1'.

   -------------  ALPHA  t1  t1'
    |- t1 = t1'

FAILURE
Fails unless the terms provided are alpha-equivalent.

SEEALSO  aconv,   ALPHA_CONV,   GEN_ALPHA_CONV

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