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Duration Calculus

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Expanding Modalities 2<br />

Neighbourhood Logic Zhou Hansen 98<br />

A first order logic with two modalities<br />

φ<br />

♦lφ<br />

<br />

<br />

a b e<br />

♦rφ<br />

<br />

<br />

b e c<br />

φ<br />

for some a ≤ b<br />

for some c ≥ e<br />

Completeness Barua Roy Zhou 2000<br />

Tallinn, November 17- 21, Michael R. Hansen – p.23/29

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