U+1D403𝐃𝐃<mi>𝐃</mi>Semantic identity and intent
Characters to distinguish
- = — Equals Sign
Use 𝐃 in the right format
Meaning and usage
𝐃 is the Unicode character named mathematical bold capital d. For Bold Capital D (𝐃), its mathematical meaning depends on the surrounding convention, alphabet style, or operator definition.
Use 𝐃 when the source convention requires this exact character. For Bold Capital D (𝐃), define styled letters and specialized glyphs explicitly, because visually similar Unicode characters may not be semantically interchangeable.
Pronunciation: bold capital d
Formula examples
𝐃 = xf(𝐃)How to type Bold Capital D
- Windows
- Use Character Map or enter Unicode 1D403 in a Unicode-aware application.
- macOS
- Open Character Viewer and search for mathematical bold capital d.
- Microsoft Word
- Type 1D403, then press Alt+X in Microsoft Word where supported.
- iPhone and iPad
- Copy and paste 𝐃, or use a math/LaTeX app. The standard iOS keyboard may not expose every mathematical symbol.
- Android
- Copy and paste 𝐃, or use a math keyboard or LaTeX editor. Keyboard layouts vary by device and app.
- Google Docs
- For plain text, paste 𝐃 or use Insert → Special characters. For structured math, use the equation editor and verify 𝐃.
- Excel
- Paste 𝐃 into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.
Common mistakes
- Do not substitute a visually similar Latin or differently styled character for 𝐃; case and mathematical alphabet style can identify different quantities.
- For plain text, copy 𝐃 as U+1D403; for structured equations, use 𝐃 in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Bold Capital D.
When to use 𝐃
- Use 𝐃 in plain text when a Unicode character is appropriate and the destination preserves U+1D403.
- Use 𝐃 in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Bold Capital D is used in math alphanumeric with a field-specific convention.
Look-alikes and related characters
- = — Equals Sign
Font and compatibility notes
Font coverage varies; verify the code point and destination rendering before publication.
Continue the workflow
From Bold Capital D to a finished equation
- Copy the characterUse 𝐃 in plain text when Unicode is accepted.
- Choose a structured formatUse
𝐃for LaTeX or the MathML snippet for accessible web equations. - Edit or convertOpen the value in the editor or converter without retyping it.
Review and source notes
Quality tier: catalog
Last reviewed: 2026-07-23
Review method: Catalog review of character identity and notation mappings.
Verified against: Unicode Standard, Unicode mathematical notation guidance, and established LaTeX/MathML syntax.
Reference sources
- The Unicode StandardUnicode Consortium — Character identity, encoding, names, and conformance.
- Unicode Character Code ChartsUnicode Consortium — Code points and official character charts.
Frequently asked questions
What does the Bold Capital D symbol mean?
𝐃 is the Unicode character named mathematical bold capital d. For Bold Capital D (𝐃), its mathematical meaning depends on the surrounding convention, alphabet style, or operator definition.
What is the LaTeX command for 𝐃?
Use 𝐃 in a compatible math environment.
Can I copy 𝐃 as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.