Date: Nov 11, 2017 12:04 PM
Subject: Re: There is no such thing as a PIECE-WISE function only your brains<br> are in pieces!

Den lördag 11 november 2017 kl. 14:42:10 UTC+1 skrev John Gabriel:
> On Saturday, 11 November 2017 08:25:34 UTC-5, John Gabriel wrote:
> > A function is defined to be ONE relation, not a thousand.
> >
> > A relation is a mapping or a rule.
> >
> > The first idiot who came up with the crap of a piece-wise function should have lost his job. It is a bogus concept.
> >
> > By its very definition, calculus only works given ONE continuous and smooth function. The moment you introduce monkey business to help you teach your shit of limits, differentiability and the ubiquitous crap such as abs(x) not being differentiable at x=0, then you are no longer dealing with calculus, but something else ... shit.

> Broken pieces of functions make for perplexing bullshit exam questions, but they are not at all useful in any other respect.

They are very useful all over the place, for example

f(t) = 1, t>=7 and t <= 20
f(t) = 0 t> 20 or t<7

Where f is a function from clock time to {0,1}, that is used to keep lights on during woken hours but off when people are asleep.