Open Resources & Licensing

How Aleph-Nought uses open educational resources and what licenses apply to platform-authored content.

Platform-Authored Content

All exercises, flashcards, structured notes, Manim videos, interactive figures, and quiz questions authored directly by Aleph-Nought are proprietary works owned by Aleph-Nought. These constitute the Platform Layer of the content model and are not licensed under any open license.

Institutional and individual subscription access is governed by the Terms of Service. For licensing inquiries, contact licensing@aleph-nought.com.

Open Educational Resources

These commercially-permissive resources are used on the platform. All carry attribution requirements honoured inline wherever the content appears.

OpenStax Calculus Vol 1, Vol 2, Vol 3

Rice University

Textbook sections embedded in Open Layer; exercises adapted to L1/L2 difficulty tier.

CC BY 4.0MATH 1, 3, 8, 13

OpenStax University Physics Vol 1, Vol 2

Rice University

Textbook sections embedded in Open Layer.

CC BY 4.0PHYS 13, 14

PhET Interactive Simulations

University of Colorado Boulder

HTML5 simulation packages self-hosted on platform CDN; embedded via iframe.

CC BY 4.0PHYS 13, 14

Active Calculus (Single & Multivariable)

Matthew Boelkins et al.

Referenced and linked only. Not adapted — no ShareAlike obligation triggered.

CC BY-SA 4.0MATH 3, 8

Linear Algebra

Jim Hefferon

Referenced and linked only. Not adapted — no ShareAlike obligation triggered.

CC BY-SA 4.0MATH 8

Vector Calculus

Michael Corral

Exercises referenced. Any distributed version includes full GNU FDL license text per license requirements.

GNU FDLMATH 8, 13

License Reference

Creative Commons Attribution 4.0CC BY 4.0

Permits sharing and adaptation for any purpose, including commercial. Requires attribution to the original author.

Full license text →

Creative Commons Attribution-ShareAlike 4.0CC BY-SA 4.0

Permits sharing and adaptation. Derivative works must carry the same license (ShareAlike). Permits commercial use. Attribution required.

Full license text →

GNU Free Documentation LicenseGNU FDL

Permits copying, distributing, and modifying for any purpose including commercial. Requires distribution of the full license text with any copy.

Full license text →

Resources Not Used

The following resources were evaluated and excluded because their non-commercial (NC) clauses are incompatible with Aleph-Nought's commercial operation (subscription and institutional licensing). Link-only references remain permitted and are not subject to license restrictions.

APEX Calculus — CC BY-NC 4.0

MIT OpenCourseWare problem sets — CC BY-NC-SA 4.0

3Blue1Brown video embeds — CC BY-NC-SA 4.0

GeoGebra interactive applets — CC BY-NC-SA 4.0

Questions about content licensing? licensing@aleph-nought.com