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Subject: Re: Operator Precedence/Boolean Logic
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On 23.06.2016 14:08, Antoon Pardon wrote:
> Op 23-06-16 om 13:45 schreef Chris Angelico:
>> On Thu, Jun 23, 2016 at 7:23 PM, Antoon Pardon
>> <antoon.pardon@rece.vub.ac.be> wrote:
>>> I don't care. In modern mathematics, zero is usaly defined as the
>>> empty set. The empty set contains nothing, but it isn't nothing
>>> itself. Otherwise the empty set would be the same as the set
>>> containing the empty set, since they both would contain the same,
>>> being nothing.
>> Zero is *the cardinality of* the empty set. The set containing the
>> empty set has a cardinality of 1.
> In modern set theory where the integers are defined as specific kind
> of sets, zero *is* the empty set.
>

Modes are like waves. If one wave arrives being "modern", lets watch out 
for the next.

There not just one set-theory, math is neither revealed nor received on 
some mount - even if the notion of truth has some theological 
connotations ;)