February 2012
Hardy spaces, commutators of singular integral... →
arxiv-nlin:
Authors: Luong Dang Ky (MAPMO)
Let be a Schrödinger operator on , , where is a nonnegative function, , and belongs to the reverse Hölder class . The purpose of this paper is three-fold. First, we prove a version of the classical theorem of Jones and Journé on weak-convergence in . Secondly, we give a bilinear decomposition for the product space . Finally, we study the commutators ...
Partition Function
isomorphismes:
5 = 5 5 = 4 + 1 5 = 3 + 2 5 = 3 + 1 + 1 5 = 2 + 2 + 1 5 = 2 + 1 + 1 + 1 5 = 1 + 1 + 1 + 1 + 1
There are 7 ways to split up five things. Seven different ways you could divide up 5 balls, 5 dolls, 5 wrapped-up candies,
How many ways are there to divide up 4 things? 8 things? 20,000 things? 198^198 things? Even if you had a few days to write a computer program that would...
the cosine wave's fundamental relationship to the...
un:
originalmaja:
woka woka woka (*makes Pac-man sound)
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Mathematician Sees Artistic Side to Father of... →
cab1729:
This year a series of events around the world will celebrate the work of Alan Turing, the father of the modern computer, as the 100th anniversary of his birthday approaches on June 23. In a book chapter that will be published later this year, mathematician Robert Soare, the founding chairman of the University of Chicago’s computer science department, will propose that Turing’s...
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Faster-than-light neutrino results were due to a... →
cab1729:
un:
discoverynews:
theweekmagazine:
And not just any mistake. A LOOSE CABLE.
“There was a good reason the measurements and reality weren’t lining up: a loose fiber optic cable was causing one of the atomic clocks used to time the neutrinos’ flight to produce spurious results.”
oops
KNEW IT!
oh damn! there goes that neutrino-walks-into-a-bar joke…
:(
RIP Nicolaas Govert de Bruijn →
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Slack Vectors, GPA, and Strategy
isomorphismes:
In the world of constrained optimisation (and let’s be realistic, what effort isn’t constrained?), slack vectors ask: “What happens if I push back the walls?”
The canonical purpose of slack vectors is in sensitivity analysis, but I think the metaphor that exists in your head once you understand slack vectors applies to everyday life too.
When you build a mathematical model of...
Will you be my valentine?
wolframalpha:
I sure hope so!
:) Happy Valentine’s Day!
Illegal prime - Wikipedia, the free encyclopedia →
cab1729:
An illegal prime is a prime number that represents information that it is forbidden to possess or distribute. One of the first illegal primes was discovered in 2001. When interpreted in a particular way, it describes a computer program that bypasses the digital rights management scheme used on DVDs. Distribution of such a program in the United States is illegal under the Digital...
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Watchisomorphismes:
averaging averages of averages to find a fixed point of a function
linear combinations of electrical signals, polynomials, waveforms, or vectors
in LISP/code > linear combination is (* scalar (+ vector vector))
computer science = magic, not done on computers
computer science is about process, new ways to do things, and in particular making computers do things you wouldn’t...
Four telescopes combine to create world’s largest... →
electronics-geek:
Engineers combine four telescopes to create world’s largest virtual device, allowing astronomers to see significantly more complex objects throughout the universe …
“Moore’s three-dimensional law is a remarkable “epiphenomenon” … a statistical...”
– Doug Hofstadter, Moore’s Law, Artificial Evolution, and the Fate of Humanity
grâce à Virgil
(via isomorphismes)
