sci.math Google Group

Re:JSH:Twin primes probability correlation

nos...@invalid.com (harry) — Sun, 14 Mar 2010 17:35:50 UT

that is not even a sentance.
the word "correlation" is way above your pay grade.
"...in this context..." makes it all meaningless.
Please try again, and back up your work with references, footnotes, a proof,
and URLS or else everybody will think you are just making this stuff up.
(google or wiki "correlation" first)

Re: Twin primes probability correlation

another_mo...@mathforum.org (Actangent the Infalllible) — Sun, 14 Mar 2010 17:26:55 UT

Have you tried blithering impotently about nothing? Is your impacted
fecal mass farting your grandmother's electric yellow brain dildo?
With twin primes a simple approach rips the prime distribution out of my
back-side.

Re: e^e

th...@sdf-eu.org (Pafnuty Tschebyscheff) — Sun, 14 Mar 2010 17:23:35 UT

Can you give me any references to this problem?
I was not able to find anything on "Humdrum Number"...

Re: Why Peano Curve is a curve?

news.dead.person.sto...@darjeeling.plus.com (Mike Terry) — Sun, 14 Mar 2010 17:21:24 UT

curve".
not just a square, but also a curve?
To answer this question, first you have to understand "What is a curve?"
I.e. what is the mathematical definition of a curve that Peano is using?
If you do not understand this, there is no doubt that you will be confused,
and nobody will be able to explain the answer to you, and this thread will

Re: It's Pi Day: Whose birthday is not in pi?

mensana...@aol.com (Mensanator) — Sun, 14 Mar 2010 17:20:49 UT

This one's funnier:

Re: It's Pi Day: Whose birthday is not in pi?

tpie...@gmail.com (TPiezas) — Sun, 14 Mar 2010 17:12:37 UT

Pisces: Feb 18- Mar 20.
That's such an awful pun, Leroy. :-)
- Titus

JSH: Twin primes probability correlation

jst...@gmail.com (JSH) — Sun, 14 Mar 2010 17:10:43 UT

With twin primes a simple approach rips the prime distribution out of
the equation.
My twin primes probability probability calculation works by taking the
ACTUAL COUNT of prime numbers in the interval p_{j-1}^2
to p_j^2, and multiplying times:
prob = ((p_j - 2)/(p_j -1))*((p_{j-1} - 2)/(p_{j-1} - 1))*...*(1/2)

Re: Source of term "multiplication" in matrix multiplication

hardm...@gmail.com (Chip Eastham) — Sun, 14 Mar 2010 17:05:25 UT

Hi, Ben:
Cayley's 1858 paper about "matrix multiplication" occurs
after his 1854 attempt to define "group" in an abstract
way:
[The abstract group concept]
[link]
So group theory forms a more plausible "background"
for Cayley's choice of words than ring theory.

Re: Topos theory: axiom of choice implies a topos is Boolean

sg...@hotmail.co.uk (Rotwang) — Sun, 14 Mar 2010 16:46:33 UT

I gather that Goldblatt differs from other texts in that it says very
little about how topoi arise in algebraic geometry and is instead
focussed on the interplay between topos theory and logic. This suits me
since I'm not interested in AG but am learning about topos theory for
applications to the foundations of quantum mechanics, but the author

Re: It's Pi Day: Whose birthday is not in pi?

qqq...@mindspring.com (Leroy Quet) — Sun, 14 Mar 2010 16:43:31 UT

And today is Albert Einstein's birthday, so Einstein was a...
Pi-eces!
Leroy

Why Peano Curve is a curve?

qzhih...@163.com (xiaoqian) — Sun, 14 Mar 2010 16:29:46 UT

Peano Curve, the limit of a curve sequence, is known as "space-filling curve".
It's easy to understand that the limit filling the square. But why it is not just a square, but also a curve?
It seems that the limit of a curve sequence is not necessary a curve. Think about this curve sequence: f(n): x*x + y*y = 1/n. (A sequence of concentric circles). The limit of f(n) is just a single point (0, 0). Of course the limit is not a curve, and it is not mean a single point and a curve contain the same number of points. Why Peano Curve means a curve and a sequence contain the same number of points?

Re: Topos theory: axiom of choice implies a topos is Boolean

sg...@hotmail.co.uk (Rotwang) — Sun, 14 Mar 2010 16:39:17 UT

I think I've figured out how to show that f u j = 1 (I'll omit
subscripts on identity arrows for brevity). Firstly, since f u j = (f u
j_1) n (f u j_2) it suffices to show that 1_d factors through f u j_1
and f u j_2. Now observe that, by the aforementioned fact about
pullbacks of coproducts, the following is a pullback:

Re: Can you use the word "assigning" to mean "mapping"?

hardm...@gmail.com (Chip Eastham) — Sun, 14 Mar 2010 16:36:38 UT

My knowledge of German is hopelessly inadequate
to finding a parallel distinction "auf Deutsch".
But I do hear in "zuordnen" a cognate to the word
"ordinate" which is commonly understood to be
the value along the vertical axis which is
dependent upon the "abscissa" (value along the
horizontal axis) in speaking of Cartesian

Re: Can you use the word "assigning" to mean "mapping"?

ma...@warwick.ac.uk (Derek Holt) — Sun, 14 Mar 2010 16:29:11 UT

On 14 Mar, 16:03, "Achava Nakhash, the Loving Snake"
As a native UK English speaker, I am ashamed to admit that I have no
idea at all what you mean by "I plan to get a back about some day". My
best theory so far is that you mean "book about it".
But on the topic of the thread, although it can become tedious, I

Re: Source of term "multiplication" in matrix multiplication

bill.ga...@microsoft.com (BillyGates) — Sun, 14 Mar 2010 16:21:54 UT

I'm curious as to why it matters. Can you give me a good argument why
knowing the true etymology has any real significance in mathematics? We can
propose several likely reasons that are all logically coherent. Is it really
important to know which one is historically true? We can imagine that any of