525
edits
Changes
Exercícios de semântica formal para a Lógica de Primeira Ordem Clássica (view source)
Revision as of 16:42, 6 October 2020
, 16:42, 6 October 2020no edit summary
== Validade global de sequentes ==
=== <math> (\exists x )(\forall y. ) \varphi </math> ▷ <math> (\forall y )(\exists x. ) \varphi </math> ===
: {{#ev:youtube|7ihfZ4wlgFw|||||start=328&loop=1}}
=== <math> (\forall y )(\exists x. ) \varphi </math> ▶ <math> (\exists x )(\forall y. ) \varphi </math> ===
: {{#ev:youtube|7ihfZ4wlgFw|||||start=563&loop=1}}