Chapter 8.2, Problem 2TFR

True-False Review

For Questions (a)-(h), decide if the given statement is true or false, and give a brief justification for your answer. If true, you can quote a relevant definition or theorem in fact from the text. If false, provide an example, illustration, or brief explanation of why the statement is false.

(b) Any two differential operators $L_1\left(D\right)$ and $L_2\left(D\right)$ commute; that is, $L_1\left(D\right)L_2\left(D\right)=L_2\left(D\right)L_1\left(D\right)$.