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Jul
12
comment What exactly is a number?
Oh, I see, but they would have to be over a a field that already satisfied those characteristics.
Jul
12
comment What exactly is a number?
I never mention matrices in my answer though, well yes, if you don't consider quaternions or octonions you can include associativety and commutativity as characteristics, I thought quaternions were considered numbers, because I have heard of people talk about the quaterions as a number system.
Jul
12
revised Probability of their's constituting a triangle?
edited body
Jul
12
revised What exactly is a number?
added 12 characters in body
Jul
12
revised Probability of their's constituting a triangle?
added 182 characters in body
Jul
12
answered Probability of their's constituting a triangle?
Jul
12
revised What exactly is a number?
added 44 characters in body
Jul
12
answered What exactly is a number?
Jul
12
comment What exactly is a number?
I don't know, but they're usefull
Jul
12
awarded  Favorite Question
Jul
12
awarded  Nice Answer
Jul
11
comment How to find know if function is onto?
if you take a function with finite domain then the fibers of the image of the functions will form a partition of the domain, so the image of any function with finite domain has cardinality less than or equal to the domain. So if the codomain is larger than the finite domain, we can be sure the map is not onto.
Jul
11
comment How to find know if function is onto?
@Teepeemm really? could you provide an example?
Jul
11
comment Discrete math and recursion problem.
fixed, thank you.
Jul
11
answered Discrete math and recursion problem.
Jul
11
comment How to find know if function is onto?
No what I am saying is if $x$ leaves residue 1 when divided by $3$ then $2x$ leaves residue $2$ when divided by $6$, if $x$ leaves residue $2$ when divided by $3$ then $2x$ leaves residue $4$ when divided by $6$, and if $x$ is a multiple of $3$ then $2x$ is a multiple of $6$.
Jul
11
revised Pirates And Coins No.1
deleted 81 characters in body
Jul
11
comment How to find know if function is onto?
No, 1 goes to 2, 2 goes to 4 and 3 goes to 6.
Jul
11
revised How to find know if function is onto?
added 10 characters in body
Jul
11
answered How to find know if function is onto?