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simplex[ratio] - return a list of ratios
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Calling Sequence
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ratio(C, x)
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Parameters
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C
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set of linear equations
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x
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variable to be used in calculating ratios
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Description
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The call ratio(C, x) returns a list of ratios which can be used to determine which equation in C is most restrictive with respect to the next simplex pivot. For each equation, the ratio computed, if possible, is
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All negative ratios are reported as infinity, as are those for which the denominator is 0.
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The equations C are in the special form produced by simplex[setup].
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The command with(simplex,ratio) allows the use of the abbreviated form of this command.
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