In "Part 2: The Calculus Definition", f and g switch roles a couple times. Before the colorized formula, "f" is described as "the plan to use", and "g" as "the

In "Part 2: The Calculus Definition", f and g switch roles a couple times. Before the colorized formula, "f" is described as "the plan to use", and "g" as "the list of inputs"; and after the colorized formula, the plan is referred to as a "kernel"; but in the formula itself, "g" is the inputs and "f" is the kernel. I realize convolution is commutative ("Part 3"), but it tripped me up a little as I tried to track the narrative.