Backward Cancel Mark \bcancel

When to use Backward Cancel Mark

Draws a backward diagonal cancellation line through an expression. In source, start from the exact \bcancel 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

\bcancel

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

Example

\bcancel{x}+y

Rendered output

backward-cancelled x

Copy and compatibility checks

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