Xi is a letter from the Greek alphabet that is written as "Ξ" in uppercase and "ξ" in lowercase. It is used in mathematics, science, and engineering to represent various quantities and concepts, and also appears in the names of organizations and fraternities.
AI-generated from the Wikipedia summary — may contain errors.
History
Archaic local variants
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).