is mentioned by

Thm* L1,L2:T List, eq1,eq2,eq3,eq4:{T}, L3,L4:T List. Discrete{T} eq1 = eq2 eq2 = eq3 eq3 = eq4 L1(~eq1)L2 L3(~eq2)L4 (L1(eq3)L3 L2(eq4)L4)	[sublist_functionality_wrt_id_list_iso_list_iso]
Thm* L1,L2:T List, eq1,eq2:{T}, L3,L4:T List. Discrete{T} eq1 = eq2 L1 = L2 L3(~eq1)L4 (L1(eq2)L3 L2(eq2)L4)	[sublist_functionality_wrt_id_id_list_iso]
Thm* L1,L2:T List, eq1,eq2,eq3:{T}, L3,L4:T List. Discrete{T} eq1 = eq2 eq2 = eq3 L1(~eq1)L2 L3(~eq2)L4 (L1 @ L3)(~eq3)(L2 @ L4)	[append_functionality_wrt_list_iso]
Thm* L1,L2:T List, eq1,eq2,eq3:{T}, L3,L4:T List. Discrete{T} eq1 = eq2 eq2 = eq3 L1(eq1)L2 L3(eq2)L4 (L1 @ L3)(eq3)(L2 @ L4)	[append_functionality_wrt_sublist]

In prior sections: core well fnd int 1 bool 1 bool 2 jlc core 3 jlc int 2 list 1