Abstract:
Algebraic semantics of the minimal logic $\mathrm{J}$
is constructed by using Johansson algebras ($\mathrm{J}$-algebras). In this
paper the description of Heyting algebras in terms of
nonembeddability of $\mathrm{J}$-algebras was found. As a corollary the
characterization of superintuitionistic, wellcomposed and some other
calculi in the class of various calculi over $\mathrm{J}$ was found.
The central role is played by a special $\mathrm{J}$-algebra $M_{0,\omega}$, constructed and described in this paper.
Keywords:Minimal logic, Johansson algebra, Heyting algebra, superintuitionistic logic, calculus.