lcp [Thu, 12 Jan 1995 10:39:47 +0100] rev 859
Proved sum_bij, sum_ord_iso_cong, prod_bij,
prod_ord_iso_cong,singleton_prod_bij, singleton_prod_ord_iso,
prod_sum_singleton_bij, prod_sum_singleton_ord_iso.
Rotated conjunctions in radd_Inl_iff, radd_Inr_iff to be more suitable for
rewriting.
lcp [Thu, 12 Jan 1995 03:04:10 +0100] rev 858
Proved case_cong and case_case.
lcp [Thu, 12 Jan 1995 03:03:45 +0100] rev 857
Renamed single_fun to singleton_fun.