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Dear Philip, In Curry's Combinatory Logic, Volume I (section 2D) congruence rules are labeled with greek letters. I do not know whether this is the satandard notation, but I am sure I occasionally met the same notation in other books/papers. All the best, Francesco Gavazzo 2017-07-03 20:04 GMT+02:00 Philip Wadler <[email protected]>: > [ The Types Forum, http://lists.seas.upenn.edu/mailman/listinfo/types-list > ] > > > Reduction for the simply-typed call-by-value lambda calculus consists of > the β rule, > > (λx.N)V ⟹ N[x:=V] > > and the congruence rules > > L ⟹ L′ > ------------ > L M ⟹ L′ M > > M ⟹ M′ > ------------ > V M ⟹ V M′ > > Question: Is there a standard greek letter for naming the congruence rules, > such as κ or γ? Or any other relevant naming convention? > > Cheers, -- P > > > . \ Philip Wadler, Professor of Theoretical Computer Science > . /\ School of Informatics, University of Edinburgh > . / \ http://homepages.inf.ed.ac.uk/wadler/ > > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > >
