Frequently Asked Questions
What does the name mean?
In linear algebra, an eigenbase is a vector space subset which has the following properties, roughly speaking:- Completeness: anything in the entire space can be expressed as a linear combination of the eigenbase components
- Orthogonality: the eigenbase components are mutually independent, meaning redundancy is minimized
- Characterization: the eigenbase components yield the most natural or "characteristic" decomposition of the space with respect to a particular operator
How do I pronounce that?
EYE-gun-base, unless you speak German.How does The Eigenbase Project license its software? How much does it cost?
The Eigenbase Project distributes open-source releases free of charge to the general public (without warranty). Licensing varies by sub-project; most components are released under the GPL, but certain libraries (eigenbase-resgen, eigenbase-properties, and eigenbase-xom) co-developed with the Mondrian project are licensed as LGPL, and the Blackhawk test framework is released under the Apache Software License.For GPL components, companies which make significant contributions to the project are granted dual-licensing so that they can create products derived from the open-source codebase. More information on this topic is available.
How can I help?
Currently, the most useful contributions are publicity and development (coding, testing, experimenting, tuning, porting, documentation, writing extensions, and integrating with other projects). The Eigenbase Project is a tax-exempt 501(c)(3) public charity, so donations are tax-deductible.Is Eigenbase code free as in beer or free as in speech?
Eigenbase code is distributed under a free software license (the GPL), meaning it's both. However, we use the term "open-source" throughout this website because The Eigenbase Project is not opposed to coexisting with closed-source software (pace Richard M. Stallman).Copyright (C) 2004-2007 The Eigenbase Project. All rights reserved. Contact: info@eigenbase.org