(7steps total) PrintForm Definitions Lemmas list 1 Sections StandardLIB Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: select firstn

  T:Type, as:T List, n:{0...||as||}, i:n. firstn(n;as)[i] = as[i]

By: (Assert (T:Type, n:as:T List. n||as||  (i:n. firstn(n;as)[i] = as[i])))
THEN
HypBackchain


Generated subgoal:

1   T:Type, n:as:T List. n||as||  (i:n. firstn(n;as)[i] = as[i])
6 steps

About:
listnatural_numberuniverseequalimpliesall
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(7steps total) PrintForm Definitions Lemmas list 1 Sections StandardLIB Doc