Skip to main content

Editorial Policy

Last updated: May 2026

Content Standards

Every page on RREF Calculator is written with two commitments: mathematical accuracy and honest communication about uncertainty. We do not simplify to the point of inaccuracy. When a concept has important edge cases (singular matrices, inconsistent systems, free variables), we address them.

Our math editorial team reviews all content against standard references before publication. The primary references are Gilbert Strang's Introduction to Linear Algebra, David Lay's Linear Algebra and Its Applications, and MIT OpenCourseWare 18.06. Where notation varies between sources, we state the convention we use.

Math Accuracy Verification

All worked examples in guides and calculator pages are computed using the same exact rational arithmetic engine that powers the calculators. We do not use approximations in worked examples. Every matrix example has been verified by running it through the calculator itself.

For formulas and theorems, we verify against at least two independent references before publishing. When we state a result (e.g., "RREF is unique for every matrix"), we can cite the specific theorem in Strang or Lay if needed.

Authorship and Review

Content is created by our team of math writers and developers and reviewed by at least one additional team member with relevant mathematical background before publication. We attribute content to "our math editorial team" rather than individual bylines to reflect this collaborative process.

We do not fabricate academic credentials. Team members have mathematical experience through software development, education, and applied mathematics. We do not claim university affiliations or academic positions we do not hold.

Correction Policy

We correct errors promptly. If you find a mathematical error, a broken calculator, or misleading content, please contact us.

For significant corrections (wrong formula, incorrect worked example, misleading claim), we:

  1. Correct the error immediately after verification
  2. Add a note at the bottom of the page: "Correction [Date]: [Description of what was changed and why]"
  3. Update the "Last modified" date in the page metadata and sitemap

For minor corrections (typos, formatting issues, clarifications that don't change the meaning), we make the fix without a formal correction notice.

Source Citations

When we reference specific theorems, formulas, or results, we cite the source. Our primary references:

  • Strang, Gilbert. Introduction to Linear Algebra, 5th ed. Wellesley-Cambridge Press, 2016.
  • Lay, David C. Linear Algebra and Its Applications, 5th ed. Pearson, 2016.
  • MIT OpenCourseWare, 18.06 Linear Algebra, Gilbert Strang. (ocw.mit.edu)

We do not reproduce copyrighted text. We reference theorems by name and number, and direct readers to the original sources for proofs.

Advertising Disclosure

This site displays advertising through Google AdSense to support ongoing development and hosting. Advertising does not influence our editorial content. Ad placement is determined by standard ad network logic, not by advertisers. We do not accept sponsored content or paid placements in our guides or calculator pages.

Updates and Versioning

Every page shows a "Updated [Month Year]" date. This reflects the most recent significant content update, not the most recent trivial edit. We review and update pages when: the mathematical standards change, we find content that needs improvement, or significant new related tools are added.