Cancel [expr]
cancels out common factors in the numerator and denominator of expr.
Cancel
Cancel [expr]
cancels out common factors in the numerator and denominator of expr.
Details and Options
- Cancel cancels out the greatest common divisor of the numerator and denominator.
- Cancel [expr,Modulus->p] generates a result modulo p.
- Cancel [expr,Extension->Automatic ] allows operations to be performed on algebraic numbers in expr.
- Cancel [expr,Trig->True ] treats trigonometric functions as rational functions of exponentials and manipulates them accordingly.
- Cancel automatically threads over lists, as well as equations, inequalities and logic functions.
Examples
open all close allBasic Examples (1)
Cancel common factors:
Scope (3)
Options (3)
Extension (1)
Modulus (1)
Over the rational numbers the numerator and the denominator have no common factors:
Over the integers modulo 2, the denominator divides the numerator:
See Also
Related Guides
History
Introduced in 1988 (1.0) | Updated in 1996 (3.0) ▪ 2007 (6.0) ▪ 2023 (13.3)
Text
Wolfram Research (1988), Cancel, Wolfram Language function, https://reference.wolfram.com/language/ref/Cancel.html (updated 2023).
CMS
Wolfram Language. 1988. "Cancel." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2023. https://reference.wolfram.com/language/ref/Cancel.html.
APA
Wolfram Language. (1988). Cancel. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Cancel.html
BibTeX
@misc{reference.wolfram_2025_cancel, author="Wolfram Research", title="{Cancel}", year="2023", howpublished="\url{https://reference.wolfram.com/language/ref/Cancel.html}", note=[Accessed: 04-January-2026]}
BibLaTeX
@online{reference.wolfram_2025_cancel, organization={Wolfram Research}, title={Cancel}, year={2023}, url={https://reference.wolfram.com/language/ref/Cancel.html}, note=[Accessed: 04-January-2026]}