Thread: Checking Linear Operators

Given



Is that how it should be written, the portion in red?

Or like this:



Thanks.

The color option isn't working. Which line is how it should be shown, thanks.

Everything you've written looks fine.

If you are worried about the expressions like:


This is well understood to be addition of functions:


So in this case:


which is exactly what you want.

However, you are missing the step rewriting:




This will allow the expression to match the linear operator format exactly without missing an intermediate step.