"f is 3" is the same as saying "3 sets of filters"?

“The convolutional block uses 3 sets of filters of size [a,b,c], f is 3…”
Just to make sure I understand: Is the number 3 in “3 sets of filters” the same 3 as in f is 3 ?
If saying “f is 3” stands for something else than the quantity of filters sets, what does it stand for?

The convolutional block consists of 3 conv2d layers in the main path and 1 conv2d layer in the shortcut path. Given a list of filter values [F1, F2, F3], use:

  1. F1 number of filters in the conv2d layer in the 1st component of main path.
  2. F2 and F3 number of filters in the conv2d layers in the 2nd and 3rd components of main path.
  3. F3 number of filters in the conv2d layer in the shortcut path.

Please read the markdown for the exercise as well.