Semantical Investigations in Heyting's Intuitionistic Logic

From the point of view of non-classical logics, Heyting''s implication is the smallest implication for which the deduction theorem holds. This book studies properties of logical systems having some of the classical connectives and implication in the neighbourhood of Heyt­ ing''s implication. I have not included anything on entailment, al­ though it belongs to this neighbourhood, mainly because of ...