This week in the arXivs…

• Lecture Notes on Equivariant Cohomology
• Asymptotic Safety
• Dynamical Quantum Geometry (DQG Programme)
• On the mathematical origin of quantum space-time
• An Invitation to Random Schroedinger operators
• A construction of the Glashow-Weinberg-Salam model on the lattice with exact gauge invariance
• Einstein Gravity as a Nonholonomic Almost Kahler Geometry, Lagrange-Finsler Variables, and Deformation Quantization
• The status of Quantum Geometry in the dynamical sector of Loop Quantum Cosmology
• Shut up and calculate
• A combinatorial and field theoretic path to quantum gravity: the new challenges of group field theory
• Surfaces and Spinors
• Noncommutative Geometry Lectures on Video

The interesting bits of today…

There are some quite interesting bits that came out today; here’s the list:

• Manifold — gravity bending action/puzzle game
• An Invitation to Higher Dimensional Mathematics and Physics
• DRM is Dead!

Quite a list, isn’t it?!

The first item is a little (flash? java?) game where the player has to create a ‘gravitational field anomaly’ in order to accomplish some tasks, e.g., jumping, avoiding sharp gears, etc. Quite neat!

The second deals with category theory in geometry and physics… but it’s a public lecture that Urs has to give. So, it’s “category theory made easy”! Maybe this can make some things more palatable to some folks!

The last item is just self-explanatory: I’ll just sit and rejoice on Amazon’s probably best move… ever!

Enjoy… !

Essa semana na Comunidade de Física…

Praqueles de vcs que têm acesso ao Orkut e que gostam de Física, eu recomendo o seguinte tópico na Comunidade Moderada de Física:

• A Relatividade Geral pode ser uma teoria de campo?

Acho que as discuss̀̀oes que apareceram por lá podem ser úteis para mais pessoas com dúvidas semelhantes — leitura massa!

Diversao garantida, []’s!

The interesting bits of today…

Just a quick set of links for today:

• Brazil’s Dreamer
• The Academic Physics Job Market
• The Academic Physics Job Market, Part 2

Enjoy, []’s!

This week in the arXivs…

• Lie point symmetries of difference equations and lattices
• Lie symmetries of multidimensional difference equations
• De Sitter Space and Eternity
• In Search of Quantum de Sitter Space: Generalizing the Kodama State
• Putting a cap on causality violations in CDT
• Vacuum and semiclassical gravity: a difficulty and its bewildering significance
• Multi-dimensional Virasoro algebra and quantum gravity
• Manifestly covariant canonical quantization of gravity and diffeomorphism anomalies in four dimensions
• Q-Curvature, Spectral Invariants, and Representation Theory
• Lorentz Violation in a Diffeomorphism-Invariant Theory.
• Dynamical Emergence of Complex Structures in Field Theories
• On the naturality of the Einstein equation
• A Yang—Mills theoretic proof of the Newlander–Nirenberg theorem
• Constructing a class of solutions for the Hamilton-Jacobi equation in field theory
• Feynman integrals and difference equations
• Deep Beauty: Understanding the Quantum World
• Real Curves, Open Strings, and A-infinity Algebras
• One way of looking at Cauchy’s theorem
• The Catsters on YouTube

Tagging…

Well, in order to try to make life a bit simpler and add a bit of order to this chaotic world of blogging… i decided to start using categories (as WordPress calls them — tag is the name everyone else uses) based on the arXivs (as you can see in the posts below).

So, if you want, you can look for something like this… and, if more people start adopting this standard… maybe we’ll really be able to organize posts that deal with material from the arXivs in a comprehensive way.

Have fun… []’s!

The interesting bits of today…

Just to entertain until tomorrow… when the real entertainment comes to the masses (see this link on the 12Sep07 )… i’ll leave some links:

• Stephen Hawking on Simpsons
• Bill Nye vs MIT atmospheric physicist on Larry King
• Icy calculations on a hot topic

Enjoy!

This week in the arXivs…

… and a little extra, just to make life a bit easier.

• Towards new background independent representations for Loop Quantum Gravity
• Microcausality in Curved Space-Time
• Fermi-point scenario of emergent gravity
• Quasiclassical Realms in a Quantum Universe
• Haar expectations of ratios of random characteristic polynomials
• QUBIT4MATLAB V3.0: A program package for quantum information science and quantum optics for MATLAB
• Critical phenomena and renormalization-group flow of multi-parameter Φ⁴ field theories
• YouTube QFT
• The new rumour mill

Yet again: My apologies…

Folks,

I apologize for causing yet more trouble… but it’s been some time now that i’ve been having some trouble with my local installation of WordPress, and all of the tricks i tried to fix it seemed to have little impact: the plugin i used to fix this situation, apparently, does not get along very well with the theme i had chosen… so things just spiraled from there.

Long story short, i decided to move to a more Web2.0 solution and use WordPress.com [as a managed solution] for hosting my blog. I’m still getting acquainted with this new environment and figuring some things out… but i hope this is it: No more moving my blog around!

I have many posts… from 2003 on that i want to bring forward to this new plataform… but i guess this will have to wait a bit until i can cook up some script to convert things around (the export facility on my installation of WordPress has also been a bit moody lately).

Anyway, i really apologize for the trouble, but i hope it won’t [ever] happen again — i appreciate your patience. As always, please, leave me a note if you see something wrong or that can be improved.

Thanks and enjoy! []’s!

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