Date: Mar 28, 2013 8:45 PM
Subject: Re: Using classes instead of sets
On 3/28/2013 3:54 PM, Ken Pledger wrote:
> In article <email@example.com>,
> firstname.lastname@example.org wrote:
>> .... Classes are allowed to contain other classes after all....
> Are you confusing members with subclasses? In Paul Halmos's classic
> "How to Write Mathematics", section 14, he suggests using "contain" for
> members and "include" for subsets. That convention may not be not
> widely used, but at least it draws attention to the possible ambiguity
> of "contains".
> Ken Pledger.
So when I quickly open my calculus book
from so many years ago, ...
"is a subset of" is the same as "is contained in"
I have a feeling that the ambiguity of
this particular colloquialism is here
That article is wonderful by the way. I suspect
you already know that.