@DaveTweed removing incorrect comments does not constitute an apology.
So do you still think that differentiation is "useless in practice" @DaveTweed, or have done a little review of first year and realized that it applies to, oh, one or two aspects of DSP?
I'm getting a bit sick of being targeted, and I'm not pleased about having my downvotes reversed. How I choose to spend my reputation is up to me, not whichever puffed up ego decided otherwise.
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