(IMAGE) Institute of Science and Technology Austria Caption When the order of the operations influences the end result, the matrices are called “non-commutative.” In this case, the product Q1 x Q2 differs from the product Q2 x Q1. Credit © Wikipedia Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.