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Tema 5 - GIAA

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Funciones de Disyunción<br />

(t-conormas ó s-normas, ⊕)<br />

• Propiedades<br />

– Conmutativa: f ∨ (a,b) = f ∨ (b,a)<br />

– Asociativa: f ∨ (a, f ∨ (b,c))=f ∨ (f ∨ (a,b),c)<br />

– Elemento neutro: f ∨ (a,0) = a<br />

– Monotonía: a ≤ b ⇒ f ∨ (a,c) , ≤ f ∨ (b,c)<br />

, • Algunas funciones<br />

– máximo : f ∨ (a,b) = max(a,b)<br />

– Suma algebraica: f ∨ (a,b) = a + b – a ⋅ b<br />

– Suma acotada: f ∨ (a,b) = min(1, a + b)<br />

– Disyunción drástica:<br />

f<br />

∨<br />

( a,<br />

b)<br />

max<br />

= f ∨<br />

( a,<br />

b)<br />

⎧<br />

b<br />

a<br />

=<br />

0<br />

⎪<br />

= ⎨a<br />

b = 0<br />

⎪<br />

⎩<br />

1 otros

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