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The Geometry Center Copyright Notice

Copyright © 1990-1995 by The Geometry Center, University of Minnesota. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that:

copies are not made or distributed for profit or direct commercial advantage,
copies bear this notice and the full citation on the first page, or first screen, or adjacent to an image, according to the type of work copied, and
The Geometry Center is notified of such use via mail (hardcopy or electronic) to Permission Department (use address in next paragraph).
Copyrights for components of this work owned by others than The Geometry Center must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permission from:
Permission Dept
The Geometry Center, University of Minnesota
400 Lind Hall
207 Church Street S.E.
Minneapolis, MN 55455
or by FAX to Permission Dept at 612-626-7131
or by email to permission@geom.umn.edu

The Geometry Center Interim Copyright Policy

The Geometry Center's copyright notice must be displayed on the first page or initial screen of a display of all works copyright by The Geometry Center, whether those works are published in print or in a digital medium. It is acceptable to place the string "© Copyright 199x by The Geometry Center" as a hypertext link to the full copyright notice (above, on this page).

Objects and Links to Objects

A link is a string that, when interpreted by an appropriate program, will access an object elsewhere in a network and fetch a copy of it to the local machine. Examples are hypertext links, URLs (universal resource locators on the World-Wide Web), and document handles.

The Geometry Center treats links as citations. Since copyright rules affect relationships between users and copyright-holders, those rules must be enforced at the time of link use, not at the time of link creation. The Geometry Center encourages the widespread distribution of links to the definitive versions of Geometry Center copyrighted works and does not require that authors obtain prior permission to include such links in their new works. The Geometry Center does ask that users tell us how they are using our materials, as described below.

If an author wishes to embed a copyrighted object rather than a link in a new work, that author first needs to obtain the copyright holder's permission. At the location of the object in the new work, the author should place a notice, "Included here with permission, © by <holder>." If the new work is on the WWW, this notice should be in the form of a link to the location specified by the copyright holder.

There is an exception to this rule. Someone who creates a work whose pattern of links substantially duplicates a copyrighted work should get prior permission from the copyright holder. For example, the creator of "A Table of Contents for the Geometry Center's Graphics Archive" -- consisting of citations and active links to copies of the works in the archive -- needs Geometry Center permission because that creator is reproducing a Center-copyrighted work. If all the links in the "Table of Contents" point to the Geometry Center definitive versions, the Center would normally give permission because then the new work advertises the Center's work. To avoid misunderstandings, authors should consult The Geometry Center before duplicating any Center work with links.

Service providers do not need to obtain prior permission from The Geometry Center to locate and dispense links to the Center's definitive versions of works, but they do need permission if they are making, collecting, or distributing copies of Geometry Center copyrighted works.

Permissions

Staff from the Permission Department of the Geometry Center will monitor permission@geom.umn.edu for requests for permissions and releases under this policy.

Please tell us how you use materials from The Geometry Center

We want to encourage the use of The Geometry Center's copyrighted materials. We also want to find out how our software, images, documents, and other materials are being used. The Geometry Center is funded by the National Science Foundation and other public agencies, and it is important that we be able to report to our funding sources the ways in which our products are being used. If you use materials from the Geometry Center, please send us a letter telling us how you use them. Send the letter to:

Permission Dept
The Geometry Center, University of Minnesota
400 Lind Hall
207 Church Street S.E.
Minneapolis, MN 55455
or by FAX to Permission Dept at 612-626-7131
or by email to permission@geom.umn.edu

This copyright notice and policy borrow heavily from material that is Copyright, 1995, by the ACM. The ACM material has been copied and modified with permission.

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