Mathematical Bold Capital L 𝐋

Visual Description: A bold uppercase L with thick strokes. The vertical stem is tall and the bottom horizontal bar stretches to the right. The lines keep a uniform width, giving a clean, compact silhouette. It reads clearly on screens, prints well, and looks deliberate in equations.

Meaning & Usage: In math, bold Latin letters like this L are used to denote emphasized quantities or structured objects. The bold style helps distinguish vectors, matrices, or special variables from ordinary letters. It is common in textbooks, software, and typesetting to signal importance or grouping.

Historical Background: The practice grows from general typography that uses bold to emphasize ideas and distinctions. In mathematics, bold capitals became a clear way to mark certain objects in dense formulas. Unicode maintains a dedicated block for mathematical alphanumeric symbols, including bold capitals like L.

Practical Use: In formulas, calculators, and math editors, users may toggle bold to emphasize a variable or label. The bold L helps separate a vector or matrix from ordinary text. Quick UI controls let you apply bold, switch readability, or compare values side by side.

See our category page for related symbols.

Look‑alikes: L (U+4C).

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