Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.
|
|
|
|
Re: Yes
Posted:
Feb 5, 2013 11:05 AM
|
|
On Feb 5, 4:24 pm, Robin Chapman <R.J.Chap...@ex.ac.uk> wrote:
> On 05/02/2013 14:08, Dan wrote:
>
>
>
>
>
>
>
> > On Feb 5, 3:45 pm, Robin Chapman <R.J.Chap...@ex.ac.uk> wrote:
> >> On 05/02/2013 13:27, Dan wrote:
>
> >>> Does there always exist a subgroup H of G such that G = NH , and
> >>> (H intersection N) = the identity element?
>
> > Can you provide an example?
Fun fact :If the set of possible answers is infinite , and person T (T
stands for troll) claims to have one ,then person B cannot determine
for sure using only yes or no questions . Each question is a function
from the set of remaining answers to {Yes,No} . Provided that the set
is infinite , either the inverse image to Yes or the inverse image of
No is infinite . There exists a sequence of choices as answers of T
such that the set of 'remaining valid answers' always remains
infinite , thereby always giving the impression of knowledge of an
answer , while ensuring for a fact that such an answer does not
exist .
|
|
|
|
