Method and apparatus for specifying a cost function that represents the estimated distance between an external state and a set of states in a space
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United States of America Patent
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Jun 6, 2006
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N/A
app pub date -
Aug 23, 2002
filing date -
Jun 4, 2002
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Abstract
Some embodiments of the invention provide a method of specifying a cost function that represents the estimated distance between an external state and a set of states in a multi-state space that represents a region of a design layout. The method identifies a first polygon that encloses the set of states. It then identifies vectors to project from the vertices of the first polygon. Based on the projected vectors, the method specifies a first cost function. The method also identifies a second polygon that encloses the set of states. It also identifies vectors to project from the vertices of the second polygon. Based on the projected vectors, the method specifies a second cost function. The method then derives a third cost function from the specified cost functions.
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