Perfect IFG-formulas
arXiv:0802.2128 · doi:10.1007/s11787-008-0037-z
Abstract
IFG logic is a variant of the independence-friendly logic of Hintikka and Sandu. We answer the question: ``Which IFG-formulas are equivalent to ordinary first-order formulas?'' We use the answer to show that the ordinary cylindric set algebra over a structure can be embedded into a reduct of the IFG-cylindric set algebra over the structure.
7 pages. Submitted to Logica Universalis. See also http://math.colgate.edu/~amann/