ETA_CONV : conv
SYNOPSIS
Performs a toplevel eta-conversion.
DESCRIBE
ETA_CONV
maps an eta-redex
"\x. t x"
, where
x
does not occur free in
t
, to the theorem
|- (\x. t x) = t
.
FAILURE
Fails if the input term is not an eta-redex.
HOL
Kananaskis 0