Bold Math Symbol \boldsymbol

When to use Bold Math Symbol

Makes a mathematical symbol bold while preserving symbol shape. In source, start from the exact \boldsymbol command instead of imitating the rendered glyph with Unicode characters or manual spacing. This keeps the expression editable and gives the renderer enough structure to apply mathematical spacing correctly.

Syntax

\boldsymbol

The documented syntax belongs to amsmath. Keep every required argument, brace pair, and environment boundary intact when moving the command between an editor, Markdown processor, notebook, or publishing system.

Example

\boldsymbol{\alpha}

Rendered output

bold alpha

Copy and compatibility checks

• Copy \boldsymbol exactly; changing its case or removing a leading backslash can turn it into plain text.
• Confirm that the destination loads amsmath before relying on this command.
• Render the example once, then inspect grouping, limits, scripts, and spacing before publishing.