Bold Math \bm

When to use Bold Math

Makes symbols and compound mathematical content bold. In source, start from the exact \bm 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

\bm

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

Example

\bm{\alpha+\beta}

Rendered output

bold expression

Copy and compatibility checks

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