ONCE_DEPTH_CONSEQ_CONVConseqConv.ONCE_DEPTH_CONSEQ_CONV : directed_conseq_conv -> directed_conseq_conv
Applies a consequence conversion at most once to a sub-terms of a term.
While DEPTH_CONSEQ_CONV c tm applies c
repeatedly, ONCE_DEPTH_CONSEQ_CONV c tm applies
c at most once.
Conv.DEPTH_CONV, ConseqConv.NUM_DEPTH_CONSEQ_CONV,
ConseqConv.DEPTH_CONSEQ_CONV,
ConseqConv.DEPTH_STRENGTHEN_CONSEQ_CONV