Computation of generalized inverses using PHP/MySQL environment

Abstract

The main aim of this paper is to develop a client/server-based model for computing the weighted Moore–Penrose inverse using the partitioning method as well as for storage of generated results. The web application is developed in the PHP/MySQL environment. The source code is open and free for testing by using a web browser. Influence of different matrix representations and storage systems on the computational time is investigated. The CPU time for searching the previously stored pseudo-inverses is compared with the CPU time spent for new computation of the same inverses.

2010 AMS Subject Classifications :

• 15A09
• 68P15
• 68N15

Keywords:

• PHP script
• MySQL database
• weighted Moore–Penrose inverse
• matrix storage formats