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arxiv: 0901.3284 · v1 · submitted 2009-01-20 · 🧮 math.MG · math.CO

Simplices and spectra of graphs, continued

classification 🧮 math.MG math.CO
keywords graphssimplicesvolumesalgebraicallyareascodimensioncodimension-2computation
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In this note we show that the n-2-dimensional volumes of codimension 2 faces of an n-dimensional simplex are algebraically independent quantities of the volumes of its edge-lengths. The proof involves computation of the eigenvalues of Kneser graphs. We also construct families of non-congurent simplices not determined by their codimension-2 areas.

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