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Slides - Institut for Matematik - Aarhus Universitet

Slides - Institut for Matematik - Aarhus Universitet

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Tropiske nulpunkterDefinitionLad f være et tropisk polynomium (i en eller flere variable).Et punkt x kaldes et nulpunkt <strong>for</strong> f hvis maksimum af termerne if antages mindst to gange.ExampleI eksemplet fra før:f(x) = (−2⊙x ⊙2 )⊕(0⊙x)⊕(1) = max(2x − 2, x, 1)er x = 1 og x = 2 eneste nulpunkter:◮ f(1) = max(0, 1, 1) = 1◮ f(2) = max(2, 2, 1) = 2Punktet x = 3/2 er ikke et nulpunkt:◮ f(3/2) = max(1, 3/2, 1) = 3/2

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