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Converging sum of reciprocals by
joeshipman@aol.com
Let X_3 be the set of positive integers constructed by sieving out all
integers that are the sum of two earlier ones in the...
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two questions about vector fields by
Phil[_3_]
1.
Consider two complete vector fields on R^n. Is it known if their Lie
bracket is complete?
2.
On a (finite-dimensional) connected manifold, is it known when the...
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simple measure theory question by
Michael J Hardy
Let (Omega, F, n) be a measure space and suppose
n(Omega) is finite. Let X:Omega --- (0,infinity)
be a measurable function. For A in F let m(A)
= integral over A of X dn. ...
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Reciprocal of a normal random variable by
magnetite
Assume X is a positive (since being negative can make things really
nasty) r.v. and approximately follows a normal distribution, and Y =
1 / X. Is Y called a inverse normal...
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Things get nicer at some huge number? by
wellsoberlin
This message is also posted with links for more information on my blog
at http://www.gyregimble.blogspot.com/
Mathematicians have long noticed that in many fields, theorems...
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Dual norms by
Harald Helfgott
(In the following, we may work on R^n, though the same questions arise
in other spaces.)
Consider two norms | |_a and | |_b. Then
phi:v - (|v|_a^p + |v|_b^p)^{1/p}
is...
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April 17th 08
by Ross 
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More on e^(pi*sqrt(163)) by
tpiezas@gmail.com
Hello all,
It is quite well-known that:
e^(pi*sqrt(19)) ~ 96^3 + 744
e^(pi*sqrt(43)) ~ 960^3 + 744
e^(pi*sqrt(67)) ~ 5280^3 + 744
e^(pi*sqrt(163)) ~ 640320^3 + 744
using...
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bounding cohomology of tensor products by
Fabrice Rosay
Hello,
I would like to know if it's possible to bound the dimension of the
cohomology vector spaces of a tensor product of two locally free
sheaves (on an algebraic variety)...
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A question about ideal theory by
PLClark@gmail.com
Suppose R is a (commutative!) integral domain in which each finitely
generated prime ideal is
principal. Must then every finitely generated ideal be principal?
I remark...
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Matrix equation XA+AX=B by
sanyi
In fact I have the equation XA+AX=ATA. What I need is some necessary
and/or sufficient conditions for the existence, uniqueness of the
solution X.
Many thanks for help, ...
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Sample Issue by
badih@future-in-tech.net
A Sample Issue of the Journal of Mathematics and Computer Science
(http://ijmcs.future-in-tech.net) can be viewed via
http://ijmcs.future-in-tech.net/SampleIssue.htm
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