Date: Mar 22, 2013 3:40 PM
Author: Virgil
Subject: Re: Matheology � 224
In article

<11b19c45-190b-4d44-81eb-ca27bab98e0d@k4g2000yqn.googlegroups.com>,

WM <mueckenh@rz.fh-augsburg.de> 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.

--