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U+2245, ≅

Mathematical Operators





  1. (mathematics) Approximately equal to.
    (The addition of quotations indicative of this usage is being sought:)
  2. (geometry) Congruent to.
    • 2017, 專門用來打好幾何基礎的數學課本 [A mathematics textbook designed to build a good foundation in geometry], volume 1 (in Chinese), Wu-Nan Book Inc., →ISBN, page 95:
      如圖2.1-7,△ABC及△DEF兩三角形全等,△ABC △DEF。
      As shown in Figure 2.1-7, △ABC and △DEF are two congruent triangles, △ABC △DEF.
  3. (algebra, category theory, logic) Isomorphic to.
    • 2011 May 5, Clive Reis, Abstract Algebra: An Introduction To Groups, Rings And Fields (in English), World Scientific Publishing Company, →ISBN, page 137:
      Suppose that G H. Then there exists an isomorphism f, say, from G to H.