Mathematical Sans-Serif Bold Small B 𝗯

Visual Description: The character is a bold, sans-serif lowercase b. It has uniform line width and clean, geometric curves. There are no serifs, giving it a compact, modern look. In math fonts it contrasts with italic letters and with plain letters, remaining legible at small sizes on screens and papers.

Meaning & Usage: As a mathematical symbol, this bold small b is used to denote a variable, vector, or parameter in formulas while maintaining clarity against italic text. It helps distinguish symbolic values from descriptive text. In interfaces it can be highlighted or toggled to show focus or comparisons.

Historical Background: Digital math styles adopted bold alphanumeric symbols to emphasize quantities without changing the letter's meaning. The goal was to keep variables distinct from descriptive text across screens and print. Designers expanded font sets to include math bold variants, enabling consistent rendering in calculators and editors.

Practical Use: In work with formulas, the bold small b signals a primary variable to compare with other letters or constants. On calculators and math apps, you may see bold letters highlighted for emphasis or for quick substitution. UI controls can toggle bold styling or switch between bold and italic for clarity in equations.

See our category page for related symbols.

Look‑alikes: b (U+62).

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