http://3cbzkrvakrpetjjppdwzbzqrlkmzatjs7jbyazap5gwutj32gcltjpqd.onion
This function definition is accepted and the function runs fine as compiled code: #eval f91 42 prints some 91 . The crucial question is now: Can we prove anything about f91 In particular, can we prove that this function is actually total? Since we now have the f91 function defined, we can start proving auxillary theorems, using whatever induction schemes we need.