Four-valued expansions of Dunn-Belnap's logic (I): Basic characterizations
Alexej P. Pynko · Bulletin of the Section of Logic · 2020
Basic results of the paper are that any four-valued expansion L4 of Dunn-Belnap's logic DB4 is de_ned by a unique (up to isomorphism) conjunctive matrix ℳ4 with exactly two distinguished values over an expansion