@article {IOPORT.05898609, author = {Cantone, Domenico and Felici, Massimo and Nicolosi Asmundo, Marianna}, title = {Solvable set/hyperset contexts. III. A tableau system for a fragment of hyperset theory.}, year = {2010}, journal = {Rendiconti dell'Istituto di Matem\`atica dell'Universit\'a di Trieste}, volume = {42}, issn = {0049-4704}, pages = {165-190}, publisher = {Istituto di Matem\`atica, Universit\`a di Trieste, Trieste}, abstract = {Summary: We propose a decision procedure for a fragment of the hyperset theory, HMLSS, which takes inspiration from a tableau saturation strategy presented in [{\it D. Cantone}, ``A fast saturation strategy for set-theoretic tableaux", Lect. Notes Comput. Sci. 1227, 122--137 (1997; Zbl 0939.00022)] for the fragment MLSS of well-founded set theory. The procedure alternates deduction and model checking steps, driving the correct application of otherwise very liberal rules, thus significantly speeding up the process of discovering a satisfying assignment of a given HMLSS-formula or proving that no such assignment exists. For Part II see [{\it A. Dovier}, {\it E. G. Omodeo} and {\it A. Policriti}, Appl. Algebra Eng. Commun. Comput. 9, No. 4, 293--332 (1999; Zbl 0936.68025)].}, identifier = {05898609}, }