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To my brother Leo
This paper is a revised version of the author’s doctoral dissertation submitted to the University of California. It is the result of an immensely enjoyable journey in the land between algebra and logic. The author wishes to express his gratitude to his guide on this journey, Professor Alfred Tarski, for his wit, his wisdom, and especially his patience. He also wishes to thank Professors Leon Henkin and Donald Monk for their advice and encouragement.
The research for this paper was supported by grants from the National Science Foundation.
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Pigozzi, D. Amalgamation, congruence-extension, and interpolation properties in algebras. Algebra Univ. 1, 269–349 (1971). https://doi.org/10.1007/BF02944991
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DOI: https://doi.org/10.1007/BF02944991