Authors: Colin James III
The ultraproduct construction of Keisler is based on definitions for proper filter in six equations and for ultrafilter in two equations. The definitions are not tautologous. This refutes the ultraproduct construction as “a uniform method of building models of first order theories which has applications in many areas of mathematics.” Claims by other writers to extend Keisler’s construction similarly fail, to form a non tautologous fragment of the universal logic VŁ4.
Comments: 3 Pages. © Copyright 2019 by Colin James III All rights reserved. Respond to author by email only: info@cec-services dot com. See updated abstract at ersatz-systems.com.
[v1] 2019-06-26 11:10:14
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