1. (100%) Addendum to the paper "Belnap's four-valued logic and De Morgan lattices" - Four-valued Logic,De Morgan
DM of De Morgan lattices as its equivalent algebraic semantics. And Theorem 4.98 of [7] states the ... algebraizable logic cannot have a strongly algebraizable proper extension with the sa
(pdf) - 31-mar-2009

2. (100%) Addendum to the paper Belnap's - Four-valued Logic,De Morgan
variety DM of De Morgan lattices as its equivalent algebraic semantics. And Theorem 4.98 of [7 ... property (that an algebraizable logic cannot have a strongly algebraizable proper extension
(ps) - 31-mar-2009

3. (75%) Addendum to the paper "Belnap's four-valued logic and De Morgan lattices" - Josep Maria Font; Four-valued Logic; De Morgan
variety DM of De Morgan lattices as its equivalent algebraic semantics. And Theorem 4.98 of [7 ... property (that an algebraizable logic cannot have a strongly algebraizable proper extension with the sa
(application/pdf) - 26-sep-2009