2 commits

Author	SHA1	Message	Date
rhiannon morris	6bffd6a11c	add converse υ rule for elim ... i think this just means type preservation is modulo subtyping. which is probably fine....?	2022-04-27 20:04:29 +02:00
rhiannon morris	5ea7880e38	typechecker stuff	2022-04-24 00:21:30 +02:00