lapply (lsred_fwd_mult … HM1) -p #HM1
@(transitive_le … IHM2) -M2
/3 width=1 by le_exp1, lt_O_exp, lt_to_le/ (**) (* auto: slow without trace *)
lapply (lsred_fwd_mult … HM1) -p #HM1
@(transitive_le … IHM2) -M2
/3 width=1 by le_exp1, lt_O_exp, lt_to_le/ (**) (* auto: slow without trace *)