Physical Studies Institute LLC (PSI) Terms of Use


Physical Studies Institute LLC (PSI) develops projects in areas of expertise documented in the InterNet archive.

Downloading Codes and Files

There is no charge for downloading and using codes or files in the archive, subject to the CONDITIONS and DISCLAIMER below. In general, Lester Ingber has retained all rights such as copyrights to these codes and files, but they may be freely used by any person or group independent of affiliations, e.g., independent of academic or commercial affiliation.


Wherever applicable, redistributions of these files must retain their copyright notice and any other lists of conditions and disclaimers contained therein.

It is expected that standard professional references or acknowledgments will be given when any of this material is used in other projects or products. All advertising and published materials mentioning features or use of any information in these files must display the following or similar acknowledgment: "This product includes information developed by Lester Ingber and other contributors."

The name of Lester Ingber may not be used to endorse or promote products derived from any information in these files without specific prior written permission.


Information in the archive is provided by Lester Ingber and contributors "as is" and any expressed or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall Lester Ingber or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this information, even if advised of the possibility of such damage.


I will only consult/contract on projects that I feel I can make a substantial contribution. My current fee is USD $350/hour. My consulting fee for developing projects requiring my optimization or financial experience and algorithms/codes is higher than if no codes are provided. A retainer is expected.

Donations to support PSI research, and pre-arranged payments for services, can be made online at

Note that I regularly address short technical queries via email, at no charge.

Thanks for visiting.



Lester Ingber <>
Copyright © 1997-2021 Lester Ingber. All Rights Reserved.

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