lean2/library/logic/core/core.md

logic.connectives

Logical operations and connectives.

• prop : the type Prop
• eq : equality and disequality
• connectives : propositional connectives
• cast : casts and heterogeneous equality
• quantifiers : existential and universal quantifiers
• if : if-then-else
• instances : type class instances
• identities : some useful identities
• examples