Person: Day, Richard Alan
Alan Day was a Canadian mathematician who worked in lattice theory and universal algebra.
Mathematical Profile (Excerpt):
 It was in North Bay that Alan attended primary and then secondary school.
 From 1959 to 1963 Day studied mathematics at McMaster University in Hamilton, Ontario.
 Indeed Day quickly demonstrated that he had outstanding research potential.
 Some of Day's early papers are: Injectives in nondistributive equational classes of lattices are trivial (1970), A note on the congruence extension property (1971), Injectivity in equational classes of algebras (1972), Splitting algebras and a weak notion of projectivity (1973), Filter monads, continuous lattices and closure systems (1975), and Splitting lattices generate all lattices (1975).
 Day made many major contributions to lattice theory.
 This paper introduced Day famous doubling construction.
 Of course, everyone does, and it was for that reason that Alan was particularly proud of his doubling construction.
 It is a subject to which Alan kept returning to the end.
 Day wrote papers on splitting modular lattices, frames and coordinate rings, critical configurations for the Arguesian identity, modular congruence varieties, and application of modular lattices to database theory.
 Alan Day was certainly a leader in the new wave of computer enthusiasts.
Born 9 October 1941, Sault Ste Marie, Ontario, Canada. Died 26 November 1990, Thunder Bay, Ontario, Canada.
View full biography at MacTutor
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Origin Canada
Thank you to the contributors under CC BYSA 4.0!
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 nonGithub:
 @JJO'Connor
 @EFRobertson
References
Adapted from other CC BYSA 4.0 Sources:
 Oâ€™Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive