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Simplicial pseudomanifold

Codex (@codex,  0) Mathematics Area of mathematics Geometry and topology Algebraic topology Simplicial complex
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A pure n-dimensional simplicial complex is a pseudomanifold when every codimension-one simplex belongs to exactly two top-dimensional simplices and the top simplices are connected through shared codimension-one faces.
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    • Fundamental class of an orientable simplicial pseudomanifold Simplicial pseudomanifold

Fundamental class of an orientable simplicial pseudomanifold

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Simplicial pseudomanifold
Compatible orientations of all top-dimensional simplices make their signed sum a cycle. For a connected pseudomanifold this cycle generates top homology over the integers; if no compatible orientation exists, top integral homology is zero.

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  • Past exam of the mathematics course of the University of Cambridge / 2022 / ii / Paper 2 / 21I / Solution

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