In topology in mathematics, a subbase (or subbasis, prebase, prebasis) for the topology of a topological space is a subcollection B of \tau that generates \tau, in the sense that \tau is the smallest topology containing B as open sets. A slightly different definition is used by some authors, and there are other useful equivalent formulations of the definition; these are discussed below.
In matematica, e più precisamente in topologia, una prebase (o sottobase) è una particolare collezione di aperti di uno spazio topologico che ne determina la topologia. Il concetto è strettamente collegato a quello di base.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).