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  • 0 posts edited
  • 0 helpful flags
  • 14 votes cast
Apr
27
awarded  Notable Question
Mar
8
awarded  Good Question
Jul
2
awarded  Curious
Jan
19
awarded  Popular Question
Jan
18
awarded  Popular Question
Jun
17
awarded  Yearling
Jun
6
awarded  Nice Question
Jun
5
accepted Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
Jun
5
comment Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
It's from a multiple choice test exam, I only know the questions and the answers, not the reason why.
Jun
5
comment Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
So in my case, there exists something that isn't a person, hence the whole statement is true?
Jun
5
comment Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
I'm probably looking at this the wrong way. But suppose P(x) means x is a person. Doesn't it say "There exists something that is a person, so everything is a person."?
Jun
5
asked Why is this true? $(\exists x)(P(x) \Rightarrow (\forall y) P(y))$
Jun
4
comment How do I show that a set is an element of a set in a Venn diagram?
This makes it very clear! I accepted the other answer because it leans closer to the Venn diagrams, but this makes the difference between a subset and a set as an element very clear.
Jun
4
accepted How do I show that a set is an element of a set in a Venn diagram?
Jun
4
comment How do I show that a set is an element of a set in a Venn diagram?
So if there was a dot next to the C we could assume C is an element of A, therefore {C} is a subset of A and C is no longer a subset of A?
Jun
4
asked How do I show that a set is an element of a set in a Venn diagram?
Jan
25
accepted Do the following conditions define a vector-space?
Jan
24
comment Is following subset W of V also a subspace?
Yes, of course. Thanks a lot!
Jan
24
asked Do the following conditions define a vector-space?
Jan
24
accepted Is following subset W of V also a subspace?