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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
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<LANGUAGE>eng</LANGUAGE>
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<TYPE>Scilab Function</TYPE>
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<DATE>April 1993</DATE>
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<SHORT_DESCRIPTION name="h_norm"> H-infinity norm</SHORT_DESCRIPTION>
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<CALLING_SEQUENCE_ITEM>[hinfnorm [,frequency]]=h_norm(sl [,rerr]) </CALLING_SEQUENCE_ITEM>
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<PARAM_NAME>sl</PARAM_NAME>
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<SP>: the state space system (<VERB>syslin</VERB> list)</SP>
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<PARAM_NAME>rerr</PARAM_NAME>
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<SP>: max. relative error, default value <VERB>1e-8</VERB></SP>
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<PARAM_NAME>hinfnorm</PARAM_NAME>
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<SP>: the infinity norm of <VERB>Sl</VERB></SP>
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<PARAM_NAME>frequency</PARAM_NAME>
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<SP>: frequency at which maximum is achieved</SP>
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produces the infinity norm of a state-space system
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(the maximum over all frequencies of the maximum singular value).</P>