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#1 2013-10-20 05:06:53
- BlitzBall
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- Registered: 2012-01-07
- Posts: 92
A few questions about subsets.
Hello all, it has been a long time since. Hope you are all well 
Anyway, I have a few questions about empty sets.
Lets take:
T (domain) = {a,b,c,d,e,f}
A = {a,b}
B = {c,d,e,f}
A∧B ⊆ T = is true.
But how is it true? Because A∧B is an empty set, and I always thought an empty set is not a subset of everything "T".
Last edited by BlitzBall (2013-10-20 05:08:47)
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#3 2013-10-20 21:35:27
- Bob
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- Registered: 2010-06-20
- Posts: 10,143
Re: A few questions about subsets.
hi BlitzBall
So mathematicians take it that the empty set is a subset of every set.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#4 2013-10-22 06:43:20
- BlitzBall
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- Registered: 2012-01-07
- Posts: 92
Re: A few questions about subsets.
Ahh I see, so that's how it is interpret. I'll remember that. Thanks a lot
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#5 2013-10-22 06:44:24
- BlitzBall
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- Registered: 2012-01-07
- Posts: 92
Re: A few questions about subsets.
BlitzBall wrote:I always thought an empty set is not a subset of everything "T".
Why not?
Maybe I have forgotten. It has been like 2 years. I wish my memory was long term 
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