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 Curious
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Jul
2
awarded  Curious
May
17
awarded  Popular Question
Sep
21
awarded  Custodian
Aug
2
accepted Is this a function?
Aug
2
comment Is this a function?
I understand now, thank you.
Aug
2
comment Is this a function?
Book of Proof by Richard Hammack. Chapter 12.1, question #12.
Aug
2
asked Is this a function?
Aug
1
revised How many equivalence classes does $R$ have?
Improved formatting
Aug
1
comment How many equivalence classes does $R$ have?
We never learned to make diagrams of equivalence classes, sadly. Thanks for your explanation though.
Aug
1
revised How many equivalence classes does $R$ have?
Updated answer
Aug
1
asked How many equivalence classes does $R$ have?
Aug
1
comment Is the function $\theta(a,b) = a-2ab+b$ a bijection from $\{0,1\}\times\mathbb{N}$ to $\mathbb{Z}$?
Thank you Andre and Rick, I understand it much better now.
Aug
1
accepted Is the function $\theta(a,b) = a-2ab+b$ a bijection from $\{0,1\}\times\mathbb{N}$ to $\mathbb{Z}$?
Aug
1
comment Is the function $\theta(a,b) = a-2ab+b$ a bijection from $\{0,1\}\times\mathbb{N}$ to $\mathbb{Z}$?
N = {1,2,3,4...}
Aug
1
asked Is the function $\theta(a,b) = a-2ab+b$ a bijection from $\{0,1\}\times\mathbb{N}$ to $\mathbb{Z}$?
Jul
24
accepted The number $\frac{1}{\sqrt{5}}\left[\left(\frac{1+\sqrt{5}}{2}\right)^{n}-\left(\frac{1-\sqrt{5}}{2}\right)^n\right]$ is always an integer
Jul
24
comment The number $\frac{1}{\sqrt{5}}\left[\left(\frac{1+\sqrt{5}}{2}\right)^{n}-\left(\frac{1-\sqrt{5}}{2}\right)^n\right]$ is always an integer
It took me awhile to figure out what you wanted me to do, but I think I got it now. Thanks so much!
Jul
23
revised The number $\frac{1}{\sqrt{5}}\left[\left(\frac{1+\sqrt{5}}{2}\right)^{n}-\left(\frac{1-\sqrt{5}}{2}\right)^n\right]$ is always an integer
deleted 75 characters in body
Jul
23
asked The number $\frac{1}{\sqrt{5}}\left[\left(\frac{1+\sqrt{5}}{2}\right)^{n}-\left(\frac{1-\sqrt{5}}{2}\right)^n\right]$ is always an integer
Jul
16
comment Prove or Disprove $xa \equiv 1 \pmod{ n}$
I meant x or a = ±1