Also known as Euler-Poincaré characteristic
topological invariant in mathematics
In mathematics, and more specifically in algebraic topology and polyhedral combinatorics, the Euler characteristic (or Euler number, or Euler–Poincaré characteristic) is a topological invariant, a number that describes a topological space's shape or structure regardless of the way it is bent. It is commonly denoted by
χ
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).