Mathematical Double-struck Capital F Symbol
𝔽 is the mathematical double-struck capital F character, useful for formal notation in math and technical writing.
U+1D53D
𝔽 is a Unicode character used in mathematical-style typesetting. It’s the double-struck (blackboard bold) capital letter F. Use it when you need a distinct, formal symbol in text, design, or developer code.
Mathematical Double-struck Capital F Symbol Meaning
𝔽 (Unicode U+1D53D) is “MATHEMATICAL DOUBLE-STRUCK CAPITAL F.” Double-struck letters are commonly used to represent standard mathematical sets or structures in notation (for example, a field often appears as a calligraphic/blackboard-bold styled letter). The exact meaning depends on context—different authors may use 𝔽 for related objects such as a specific field or a family of sets. Because it’s a dedicated Unicode character, using 𝔽 helps maintain consistent typography and avoids mismatched fonts or manually styled letters when composing documents, posts, or UI text.
Common uses
- •Writing formal math text where a double-struck capital F is required
- •Labeling variables, sets, or structures in academic notes and papers
- •Creating consistent UI typography for math-focused dashboards or editors
- •Designing infographics or posters with math-style letterforms
- •Using the symbol in code comments, documentation, or formulas
Examples
𝔽 — Mathematical Double-Struck Capital F
- 𝔽Let 𝔽 be a field with characteristic 0.
- 𝔽We define 𝔽 as the set of admissible functions.
- 𝔽Consider the map from 𝔽 to ℝ.
- 𝔽For 𝔽, the operation satisfies associativity.
- 𝔽The structure 𝔽 is closed under addition.
Ready to copy
Technical codes
| Unicode | U+1D53D | |
| HTML Entity | 𝔽 | |
| HTML Code | 𝔽 | |
| CSS | \1D53D |
FAQ
What does the Mathematical Double-struck Capital F symbol mean?
𝔽 (Unicode U+1D53D) is “MATHEMATICAL DOUBLE-STRUCK CAPITAL F.” Double-struck letters are commonly used to represent standard mathematical sets or structures in notation (for example, a field often appears as a calligraphic/blackboard-bold styled letter). The exact meaning depends on context—different authors may use 𝔽 for related objects such as a specific field or a family of sets. Because it’s a dedicated Unicode character, using 𝔽 helps maintain consistent typography and avoids mismatched fonts or manually styled letters when composing documents, posts, or UI text.
What Unicode character is 𝔽?
𝔽 is MATHEMATICAL DOUBLE-STRUCK CAPITAL F with Unicode codepoint U+1D53D.
How can I copy 𝔽 into HTML?
Use the HTML entity 𝔽 or paste the character directly: 𝔽.
What escapes can I use in CSS or JavaScript?
CSS escape: \\1D53D. JavaScript escape: \\u{1D53D}.
Does 𝔽 always mean the same thing?
Not always. The symbol’s meaning depends on the surrounding notation, though it’s commonly used in formal mathematical writing for structures like fields.