Re: The nature of the mathematical set

John Jones <jonescardiff@xxxxxxx> writes:

This is different from being a subset, which is a transitive relation:
If set X is a subset of set Y and Y is a subset of set Z, then X is a
subset of Z.

The term 'subset' seems redundant in this definition, especially as it
has no definition.

Good catch! Why *do* mathies use undefined terms like "subset"?

--
"I've been thinking about my problems with getting any kind of
admission that my math arguments showing the core error in mathematics
are correct, so I've gone to marketing books."
-- James S. Harris, on when mathematics isn't enough
.

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