section‹Operations›
theory Operations
imports Main
begin
class left_imp =
fixes imp_l :: "'a → 'a → 'a" (infixr ‹l→› 65)
class right_imp =
fixes imp_r :: "'a → 'a → 'a" (infixr ‹r→› 65)
class left_uminus =
fixes uminus_l :: "'a => 'a" (‹-l _› [81] 80)
class right_uminus =
fixes uminus_r :: "'a => 'a" (‹-r _› [81] 80)
end
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