lean2/library/logic/logic.md

logic

Logical constructions and theorems, beyond what has already been declared in init.datatypes and init.logic.

The command import logic does not import any axioms by default.

• connectives : the propositional connectives
• eq : additional theorems for equality and disequality
• cast : casts and heterogeneous equality
• quantifiers : existential and universal quantifiers
• identities : some useful identities
• default

Subfolders:

• examples