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ZeroTest

is an option to various linear algebra functions that gives a function to use in testing whether symbolic expressions should be treated as zero.

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ZeroTest

ZeroTest

is an option to various linear algebra functions that gives a function to use in testing whether symbolic expressions should be treated as zero.

Details

Examples

Basic Examples  (1)

The automatic ZeroTest used by LinearSolve does not detect that mat is non-singular:

With a stronger zero test, LinearSolve gives the correct answer:

Wolfram Research (1988), ZeroTest, Wolfram Language function, https://reference.wolfram.com/language/ref/ZeroTest.html (updated 2007).

Text

Wolfram Research (1988), ZeroTest, Wolfram Language function, https://reference.wolfram.com/language/ref/ZeroTest.html (updated 2007).

CMS

Wolfram Language. 1988. "ZeroTest." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2007. https://reference.wolfram.com/language/ref/ZeroTest.html.

APA

Wolfram Language. (1988). ZeroTest. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ZeroTest.html

BibTeX

@misc{reference.wolfram_2025_zerotest, author="Wolfram Research", title="{ZeroTest}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/ZeroTest.html}", note=[Accessed: 08-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_zerotest, organization={Wolfram Research}, title={ZeroTest}, year={2007}, url={https://reference.wolfram.com/language/ref/ZeroTest.html}, note=[Accessed: 08-August-2025]}