| 词条 | Horseshoe (symbol) |
| 释义 |
Horseshoe[1] (⊃, \\supset in TeX) is a symbol used to represent:
It was used by Russell and Whitehead in Principia Mathematica. In Unicode the symbol is encoded {{unichar|2283|superset of|html=}}. See also
References1. ^Whitehead, A.N., and Russell, Bertrand, Principia Mathematica {{Common logical symbols}} 1 : Logic symbols |
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