equal
deleted
inserted
replaced
333 end |
333 end |
334 |
334 |
335 context lattice |
335 context lattice |
336 begin |
336 begin |
337 |
337 |
338 lemma dual_lattice: "class.lattice sup (op \<ge>) (op >) inf" |
338 lemma dual_lattice: "class.lattice sup (\<ge>) (>) inf" |
339 by (rule class.lattice.intro, |
339 by (rule class.lattice.intro, |
340 rule dual_semilattice, |
340 rule dual_semilattice, |
341 rule class.semilattice_sup.intro, |
341 rule class.semilattice_sup.intro, |
342 rule dual_order) |
342 rule dual_order) |
343 (unfold_locales, auto) |
343 (unfold_locales, auto) |
435 by (rule distrib_imp2 [OF sup_inf_distrib1]) |
435 by (rule distrib_imp2 [OF sup_inf_distrib1]) |
436 |
436 |
437 lemma inf_sup_distrib2: "(y \<squnion> z) \<sqinter> x = (y \<sqinter> x) \<squnion> (z \<sqinter> x)" |
437 lemma inf_sup_distrib2: "(y \<squnion> z) \<sqinter> x = (y \<sqinter> x) \<squnion> (z \<sqinter> x)" |
438 by (simp add: inf_commute inf_sup_distrib1) |
438 by (simp add: inf_commute inf_sup_distrib1) |
439 |
439 |
440 lemma dual_distrib_lattice: "class.distrib_lattice sup (op \<ge>) (op >) inf" |
440 lemma dual_distrib_lattice: "class.distrib_lattice sup (\<ge>) (>) inf" |
441 by (rule class.distrib_lattice.intro, rule dual_lattice) |
441 by (rule class.distrib_lattice.intro, rule dual_lattice) |
442 (unfold_locales, fact inf_sup_distrib1) |
442 (unfold_locales, fact inf_sup_distrib1) |
443 |
443 |
444 lemmas sup_inf_distrib = sup_inf_distrib1 sup_inf_distrib2 |
444 lemmas sup_inf_distrib = sup_inf_distrib1 sup_inf_distrib2 |
445 |
445 |