Prev: Number of digits in factorial
Next: Number Representation Problem
From: Bill Dubuque on 23 Jan 2010 19:37
"Richard L. Peterson" <rl_pete(a)yahoo.com> writes:
>
> I just read this in abook by William Stein.

See my post [1] for links to some of JHCs posts on such, e.g. [2]

[1] http://google.com/groups?selm=y8z8xq2x1o0.fsf%40nestle.csail.mit.edu

[2] geometry.research, Sep 2 2000, -1 as a prime
http://google.com/groups?threadm=8o6dh8$8o7$1%40nntp9.atl.mindspring.net

From: Richard L. Peterson on 23 Jan 2010 09:40
Thanks, Timothy, Johan and Fred.
From: Bill Dubuque on 23 Jan 2010 20:22
Bill Dubuque <wgd(a)nestle.csail.mit.edu> wrote:
> "Richard L. Peterson" <rl_pete(a)yahoo.com> writes:
>>
>> I just read this in abook by William Stein.
>
> See my post [1] for links to some of JHCs posts on such, e.g. [2]
>
> [1] http://google.com/groups?selm=y8z8xq2x1o0.fsf%40nestle.csail.mit.edu
>
> [2] geometry.research, Sep 2 2000, -1 as a prime
> http://google.com/groups?threadm=8o6dh8$8o7$1%40nntp9.atl.mindspring.net

I should also mention [3], where JHC points out that the idea goes back
to Hasse, who used "unit primes" instead of the modern "infinite primes".

[3] John Conway. The Genus Of A Quadratic Form
http://math.arizona.edu/~swc/aws/09/09ConwayNotesPrelim.pdf
From: Andrew Usher on 23 Jan 2010 21:31
On Jan 23, 6:37 pm, Bill Dubuque <w...(a)nestle.csail.mit.edu> wrote:

> See my post [1] for links to some of JHCs posts on such, e.g. [2]
>
> [1]http://google.com/groups?selm=y8z8xq2x1o0.fsf%40nestle.csail.mit.edu
>
> [2] geometry.research, Sep 2 2000, -1 as a primehttp://google.com/groups?threadm=8o6dh8$8o7$1%40nntp9.atl.mindspring.net

[2] confirms my guess.

Andrew Usher
From: spudnik on 23 Jan 2010 22:21
aren't those known as "associates?"

> 5 = (2+i)(2-i) = (1+2i)(1-2i) = (-2-i)(-2+i) = (-1-2i)(1+2i)

--les OEAuvres!
http://wlym.com
First  |  Prev  |  Next  |  Last
Pages: 1 2 3 4
Prev: Number of digits in factorial
Next: Number Representation Problem