𝟙

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𝟙 U+1D7D9, 𝟙
MATHEMATICAL DOUBLE-STRUCK DIGIT ONE
← 𝟘
[U+1D7D8] 		Mathematical Alphanumeric Symbols 𝟚 →
[U+1D7DA]

Translingual

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Symbol

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𝟙

  1. (mathematics) indicator function

Usage notes

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The corresponding set is usually denoted by a subscript: 𝟙A.

Synonyms

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