Forum: Homework Help
2009-09-10, 22:00
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Replies: 60
Views: 7,880
"The question is at best poorly posed."
"The...
"The question is at best poorly posed."
"The question itself is wrong headed".
"Part of learning mathematics is learning to ask the
right questions.
Part of learning mathematics is learning...
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Forum: Lounge
2009-09-10, 21:20
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Replies: 7
Views: 583
Data Transfer record?
http://www.theregister.co.uk/2009/09/10/pigeon_v_broadband/
South African homing pigeon transmits 4GByte in 2 hours; 1 hour 8 minutes for the 60 mile travel and 1 hour to download the ramstick,...
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Forum: Math
2009-08-04, 11:09
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Replies: 10
Views: 1,087
That is a large widening of the discussion.
I...
That is a large widening of the discussion.
I note that I (and many others) have made more money from music and software than I have spent on music and software.
You are welcome to start a thread ...
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Forum: Math
2009-08-03, 08:31
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Replies: 10
Views: 1,087
An open access library is a good idea, and the...
An open access library is a good idea, and the maths community would benefit.
However the profit making publishers will not give away a right to copy.
The benefits of an electronic open access...
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Forum: Math
2009-07-29, 18:59
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Replies: 22
Views: 1,154
I've given it a moment more thought,
and as a...
I've given it a moment more thought,
and as a certificate that I have read the links; there is a misprint in the last table of the poster A(105) should be 2. In the main paper tables 6 and 7, the...
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Forum: Astronomy
2009-07-24, 19:45
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Replies: 24
Views: 2,574
Just my counter-intuitive disputable tuppence...
Just my counter-intuitive disputable tuppence worth...
Assume it is just 2 bodies with point masses,
(point masses may be found in all school physics labs, next to the perfectly rigid massless...
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Forum: Math
2009-07-20, 17:20
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Replies: 22
Views: 1,154
Let me know when we can start throwing chalk...
Let me know when we can start throwing chalk :smile:
Serwus again Alex!
I will start to look at things the roots of unity direction, if I must, although I want to play with integers, preferably...
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Forum: Math
2009-07-20, 13:42
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Replies: 22
Views: 1,154
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Forum: Math
2009-07-20, 08:49
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Replies: 22
Views: 1,154
Thanks for that RD,
sorry for waffling on,...
Thanks for that RD,
sorry for waffling on, but I am trying to understand it rather than just getting somebody to give me the answer.
I was thinking along the lines of degree of phi_n(x) =...
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Forum: Math
2009-07-19, 21:20
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Replies: 22
Views: 1,154
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Forum: Forum Feedback
2009-07-19, 09:14
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Replies: 9
Views: 1,768
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Forum: Math
2009-07-16, 10:02
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Replies: 22
Views: 1,154
Cyclotomic Phi
Does anybody know of any results on the average size of Phin(a), or a lower bound?
Has anybody even shown that Phin(a) !=1 ??
If anybody could point me in the direction of any books or papers I...
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Forum: Data
2009-07-11, 19:26
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Replies: 38
Views: 3,965
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Forum: Data
2009-07-11, 12:55
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Replies: 38
Views: 3,965
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Forum: Data
2009-07-09, 10:06
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Replies: 38
Views: 3,965
Where may I find the data?
There are no...
Where may I find the data?
There are no links at the bottom of that page and the link to factors.zip (ftp://mersenne.org/gimps/factors.zip) gives a 505 error.
How many factors should I expect...
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Forum: Lounge
2009-07-07, 21:11
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Replies: 11
Views: 887
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Forum: Data
2009-07-07, 15:09
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Replies: 38
Views: 3,965
The biggest known smallest k is...
The biggest known smallest k is (M42643801-1)/(2*42643801) :smile:
This thread is interesting.
What is the average k? How often is k=1?
or where is the data so that I can average it myself?
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Forum: Math
2009-07-02, 00:26
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Replies: 67
Views: 6,926
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Forum: Math
2009-06-30, 21:29
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Replies: 7
Views: 999
Cool, respect.
Of course -d'uh!
So...
Cool, respect.
Of course -d'uh!
So after I have made every basic mistake possible I end up with
~2n1/2/log(n)
or BigTheta(n1/2/log(n))
On repeated factors of Phi, or generalised...
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Forum: Math
2009-06-30, 12:35
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Replies: 7
Views: 999
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Forum: Math
2009-06-30, 11:06
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Replies: 7
Views: 999
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Forum: Hardware
2009-06-30, 09:55
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Replies: 39
Views: 3,038
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Forum: Math
2009-06-28, 00:41
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Replies: 7
Views: 999
Prime Powers
Prime Powers (exponent >= 2) are supposed to be rare, but how rare?
No Cunningham numbers can be prime powers, so there is no problem there with SNFS or GNFS.
How rare are they?
Let C(n) be...
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Forum: Hardware
2009-06-25, 16:40
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Replies: 39
Views: 3,038
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Forum: Hardware
2009-06-25, 14:37
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Replies: 39
Views: 3,038
I cannot get excited by 20 cheap PCs.
I am...
I cannot get excited by 20 cheap PCs.
I am thinking more Lamborghini rather than a minibus.
Admittedly the minibus does more people.metres/second, but it is not a dream machine.
Other good threads...
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