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Topic: Using classes instead of sets
Replies: 26   Last Post: Apr 1, 2013 8:04 PM

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Ken.Pledger@vuw.ac.nz

Posts: 1,378
Registered: 12/3/04
Re: Using classes instead of sets
Posted: Mar 28, 2013 4:54 PM
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In article <19071bf4-69f8-4ce3-94cb-109044e3f323@googlegroups.com>,
pepstein5@gmail.com 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.



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