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asterix07
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es modello/contromodello scelta multipla

Ma come si eseguono questi tipi di esercizi?

Siano A l’insieme {a, b}, P, Q, R lettere predicative unarie. Stabilire per quali
(una o pi`u) delle seguenti interpretazioni I la struttura A = (A, I) `e un modello
per la formula
8x((P(x) ! Q(x)) ! R(x)) ^ 9x9y(P(x) ^ ¬R(y))

Potete spiegarmi anche (sempre nello stesso tipo di esercizo) richiede contromodello anzichè modello?

04-07-2010 19:24
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