Date: Mar 22, 2013 3:40 PM
Subject: Re: Matheology � 224
WM <firstname.lastname@example.org> wrote:
> But I don't want to remove a set. When has it been prohibited to
> handle elements of a set?
One cannot remove an element from a set of elements without removing the
singleton set containing that element from the set of all subsets of the
set of elements.
One cannot remove a line from the set of all lines without removing the
set containing only that line from the set of all sets of lines.
At least not outside Wolkenmuekenheim.