[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: AW: AW: Several comments
"Michael Burschik" <Burschik@xxxxxxxxxxxxxxx> writes:
> > > But my point that an empty vector is a pathological case
> > remains valid.
> > > An empty list, or an empty collection/set, however, is
> > perfectly legitimate.
> > There is nothing more pathological about an empty vector than any of
> > the others.
> I seem to recall that zero-dimensional vectors were considered something of
> an oddity in my algebra classes, and I am pretty certain that I have never
> used one, whereas I use empty lists and empty sets on a regular basis, but
> maybe you are right.
They are like the empty set: they seem odd only until they seem second
nature, at which point they are ordinary and boring. Rather like
What is slightly odder is a matrix of dimension zero; such a matrix
necessarily has no elements. This is unusual, because for any other
dimension, a single-element matrix is possible. That means that you
can convert scalars to matrixes for any dimension but zero.
Still, not a big deal.