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https://pure.psu.edu/en/publications/exactness-and-the-kadison-kaplansky-conjecture/ Exactness and the kadison-kaplansky conjecture - Penn State kaplansky conjecture penn state exactness kadison https://digitalcommons.fairfield.edu/mathandcomputerscience-facultypubs/58/ "Orderable groups, elementary theory, and the Kaplansky conjecture" by Benjamin Fine, Anthony... We show that each of the classes of left-orderable groups and orderable groups is a quasivariety with undecidable theory. In the case of orderable groups, we... elementary theory kaplansky conjecture benjamin fine orderable groups