Image reuse policy
Use number-symbol visualizations in lessons and learning materials
Standard visualizations are CC0. Ancient Egyptian Numerals visualizations are CC BY 4.0.
Teachers, families, and students may copy, modify, publish, redistribute, and combine covered Atlas visualizations with lessons, worksheets, presentations, home math practice, or other work. Standard-family files require no attribution; Ancient Egyptian Numerals files require a simple creator credit.
The permissions
Two symbol families, two clear licenses
Standard symbols
CC0 1.0 Universal
Standard-family exports are dedicated to the public domain under CC0 1.0 Universal. Copy, modify, publish, sell, and redistribute them for any lawful purpose without attribution. This dedication is irrevocable.
Ancient Egyptian Numerals
Creative Commons Attribution 4.0
Egyptian-family exports are licensed under CC BY 4.0. You may share, adapt, and use them commercially if you credit Entropycal Studio LLC, link to the license, and indicate material changes. Copyright ownership stays with the studio; the license grants reuse permission rather than transferring ownership.
Suggested Egyptian-family credit: “Ancient Egyptian Numerals visualization by Entropycal Studio LLC / Numerosidad — CC BY 4.0.”
You do not need to register, pay, or contact us before using a covered file under its stated license.
Scope
What this policy covers
Standard-family files
This CC0 dedication covers canonical Number Atlas PNG and SVG visualization files
whose permanent page displays the CC0 notice—currently the English
numerosidad-number-…-place-value.png and
numerosidad-number-…-place-value.svg files under
/assets/number-atlas/v1/, the Spanish
numerosidad-numero-…-valor-posicional.png and
numerosidad-numero-…-valor-posicional.svg files under
/assets/number-atlas/v1/es/, and Standard-family PNG or SVG visualization
exports created with the interactive Number Atlas.
Egyptian-family files
CC BY 4.0 covers complete PNG and SVG visualizations generated with the Ancient Egyptian Numerals option, including the downloadable Atlas exports and the Atlas-generated examples on the explainer page. The permission covers the icons as they appear within those complete rendered visualizations.
Not separately released
Neither license separately releases the original Egyptian sprite files, other game artwork, the Numerosidad or Entropycal names, logos, wordmarks, source code, screenshots, video, audio, press materials, or unrelated website assets unless they carry their own notice.
Important limits
No trademark license or endorsement
CC0 and CC BY address copyright and related rights. They do not grant rights to the Numerosidad or Entropycal names, logos, or trademarks, and your use must not imply that Entropycal Studio LLC endorses you, your product, or your organization.
Covered files are provided as-is, without warranties. You remain responsible for your use and for any rights, laws, or permissions that may apply to your project.