Image:Quadric Hyperbolic Cylinder.jpg

http://en.wikipedia.org/wiki/Image:Quadric_Hyperbolic_Cylinder.jpg

This image is ineligible for copyright and therefore is in the public domain, because it consists entirely of information that is common property and contains no original authorship.

[edit] Licensing

This file has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. This applies worldwide.

Note: This tag is obsolete! Nothing is public domain without a reason. Don't use this generic template - please use instead: {{PD-old}} (for works out of copyright where the author has been dead for over 70 years), {{PD-Art}} (for photos of old paintings and art out of copyright), {{PD-ineligible}} (for trivial work), {{PD-USGov}} (for work by the U.S. federal government), {{PD-self}} (if the uploader and creator releases the rights), {{PD-user|user}} (if another user released his/her rights), or {{Copyrighted free use}}. use {{PD-user-w|projectcode|projectname|username}} for users with no account on Commons. {{PD-author|Author's name}} - for works released into the public domain by non-Wikimedia users. If the work is PD for another reason, check the copyright tag page or use {{PD-because|reason}}. العربية | Български | Česky | Deutsch | English | Español | Français | हिन्दी | Italiano | 日本語 | ‪Norsk (bokmål)‬ | ‪Norsk (nynorsk)‬ | Português | Русский | Slovenčina | Slovenščina | Српски / Srpski | Polski | Türkçe | 中文 | +/-

• Quadric