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\DOC BINDER_CONV
\TYPE {BINDER_CONV : conv -> term -> thm}
\SYNOPSIS
Applies conversion to the body of a binder.
\DESCRIBE
If {c} is a conversion such that {c `t`} returns {|- t = t'}, then
{BINDER_CONV c `b (\x. t)`} returns {|- b (\x. t) = b (\x. t')}, i.e. applies
the core conversion to the body of a `binder'. In fact, {b} here can be any
term, but it is typically a binder constant such as a quantifier.
\FAILURE
Fails if the core conversion does, or if the theorem returned by it is not of
the right form.
\EXAMPLE
{
# BINDER_CONV SYM_CONV `@n. n = m + 1`;;
val it : thm = |- (@n. n = m + 1) = (@n. m + 1 = n)
# BINDER_CONV (REWR_CONV SWAP_FORALL_THM) `!x y z. x + y + z = y + x + z`;;
val it : thm =
|- (!x y z. x + y + z = y + x + z) <=> (!x z y. x + y + z = y + x + z)
}
\SEEALSO
ABS_CONV, RAND_CONV, RATOR_CONV.
\ENDDOC
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