The Linear Systems Toolkit contains 66 m-functions that realize all the structural decompositions of linear systems, and their properties (such as finite and infinite zero structures, invertibility structure and geometric subspaces) as well as applications (such as system factorizations and sensor selection), documented in the monograph, Linear Systems Theory: A Structural Decomposition Approach, authored by B. M. Chen, Z. Lin and Y. Shamash (Birkhauser, Boston, 2004).

The beta version of this toolkit is currently available for free. Interested readers might wish to register below. A zipped file that contains all m-functions of the toolkit will then be sent to the registered email addresses. Registered users will also automatically receive any advanced version of the toolkit through email. Nonetheless, the owners of the toolkit reserve all the rights. Users should bear in mind that the toolkit downloaded from the web site or received through email is free for use in research and academic work only. Uses for other purposes, such as commercialization, commercial development and redistribution without permission from the owners, are strictly prohibited.

The contents of the toolkit can be viewed by clicking this link. Some of these m-functions are interactive, which require users to enter desired parameters when executed. Some are implemented in a way that can return results either in a symbolic or numerical form. Detailed descriptions of the toolkit and the user manual can be found in Chapter 12 of the monograph.

Interested readers please send us an email with (1) your name; (2) email address; (3) institution; and (4) country. A zipped file, linsyskit.zip, containing all the m-functions of the toolkit will be sent to your email address. Please note that we might verify your information first before sending out the package to you. Once again, note that your information will be added to our database for distribution of future versions.

> > ... This link leads to the list of errata for the monograph mentioned above ...