≇

See also: Appendix:Variations of "="

≇ U+2247, ≇ NEITHER APPROXIMATELY NOR ACTUALLY EQUAL TO Composition: ≅ [U+2245] + ◌̸ [U+0338] ← ≆ [U+2246] Mathematical Operators ≈ → [U+2248]

Translingual

Symbol

≇

1. (mathematics) Neither approximately nor actually equal to.
2. (geometry) Not congruent to.
   • 2021, Barbara E. Reynolds, William E. Fenton, College Geometry with GeoGebra (in English), John Wiley & Sons, →ISBN, page 77:

     Assume that ΔABC ≇ ΔDEF. Then a pair of corresponding angles, say A and D, is not congruent.

3. (mathematics) Not isomorphic to.
   • 2015, Vladimir Lepetic, Principles of Mathematics: A Primer (in English), John Wiley & Sons, →ISBN, page 399:

     Similarly, if one can prove that there is no one-to-one correspondence between the groups, manifestly they are not isomorphic. For instance, each group of fourth order is either isomorphic to the Klein group V or to the group of square rotation R₄, while V ≇ R₄.