Math Forum / Mathematics / Undergraduate Math / November 2008

I have found a problem with the established view of something called
the ring of algebraic integers, but rather than acknowledge the issue
the mathematical community has tried to hide from it, so here is some
very basic algebra with a simple request for those defending the

Define a set S to be "unknowable" if there is no set T such that S is in T and T is definable with no arguments. (Definition of definability: http://en.wikipedia.org/wiki/Definable_set) Is there an unknowable set?
It's been pointed out to me that "the set containing S and only S" ...

why people keep saying that Six sigma is 99.99 or Six sigma has a
probablity of 99.99 ?
NB:- i am by no means a math expert,please bear with me if i am naive

Just try as many as you can. You can just do one or two. Please do them without a calculator. Thanks for helping. I'm a newbie so I might be posting in the wrong section.
1. Find the value of a^5(a+6) + 5a^3(3a+4) + 3a(5a+2) given that a+1=6th root of 7.
2. How many different ...

Hey all,
Suppose that I have an elastic strand that is constrained on either
end by two points that move over time. So, the position of the strand
is fully constrained, but the orientation of the strand is under-

I am a solutions manual collector, I offer solutions manual ebook
servicesNote:
all solutions manual in soft copy
that mean in Adobe Acrobat Reader  (PDF ) format. if you want any book

I'm trying to prove the mean value theorem in the multidimensional
case and got stuck on a detail. Maybe someone here can help.. If we
have a function (x and y belong to R^n so it's a vector-valued
function) f (ty + (1-t)x) and we want to derive in respect to t, how

Please could you help me with the following.
I am trying to solve a problem in which it is asked to compute Covariance(X,Y).
The information the problem gives are:
sum Xi = 859;        sum Xi^2 = 47 387

Here in an equation
ax^n + bx^m + c = 0
Please anyone let me know the roots of this equation, that is x = ?

I can easily see mathematicians doggedly walking through a rain of
spit to keep teaching the wrong ideas if they can get to their
offices, close the door, and continue the fantasy, as what is the
alternative?

Read Help express these in sums and differences of logarithms and multiples...
Posted: Nov 3, 2008 12:50 PM    
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These two problems have had me stuck ...

If you've followed the discussion at all where I've been arguing with
sci.math'ers where things have now degenerated down to who introduced
various terminology when, you may wonder how can such stupid people
have killed a freaking math journal and blocked a major research

I think I've finally stumbled across an irrefutable way to demonstrate
that the ring of algebraic integers is severely flawed.  You can try
to be in that ring for it.
Given

Hi - any help would be greatly appreciated
Question:
Four vectors a; b; c and x satisfy the relation: (a . x)b = c + x.
Show that (b . a . 1)a . x = c . a

Some easy algebra casts doubt on core algebraic number theory but that
conclusion is so hard to accept despite the ease of the mathematics.
Consider a simple polynomial P(x) = 175x^2 - 15x + 2.  Multiply it
times 7, to get