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Alex Nelson
Works at Unfold, Inc.
Attended University of California, Davis
Lives in Los Angeles, California
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Alex Nelson

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Three roads to Classical Gauge Fields: the old fashioned "differential geometry" approach, the newfangled "Lie Algebroid" approach, and a Noncommutative Geometry inspired approach.

Reviewed here:
http://arxiv.org/abs/1404.4604
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Alex Nelson

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I just found out Tom Sharpe passed away six months ago.

Sharpe's best work lampooned the South African Apartheid. Everyone should read Riotous Assembly and Indecent Exposure once in their lives.

"Dedication: The South African police force whose lives are dedicated to the preservation of western civilisation in southern Africa."
-- Sharpe's ironic dedication in Riotous Assembly

http://www.bbc.com/news/entertainment-arts-22795507
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+mohamed amine Bahayou may be interested in this fascinating paper:

Y. Nikolayevsky, Yu.G. Nikonorov, "Solvable Lie groups of negative Ricci curvature". Eprint, 18 pages. http://arxiv.org/abs/1312.6803

Abstract: We consider the question of whether a given solvable Lie group admits a left-invariant metric of strictly negative Ricci curvature. We give necessary and sufficient conditions of the existence of such a metric for the Lie groups the nilradical of whose Lie algebra is either abelian or Heisenberg or standard filiform, and discuss some open questions.
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Many thanks dear Alex, for the nice gift. Merry Holidays and happy new year!
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A follow up to my last post, this curious eprint:

Ron Mairmon, "Computational Theory of Biological Function I" http://arxiv.org/abs/q-bio/0503028

The abstract alone is quite intriguing! I should sit down and read it one of these weekends...

#spnetwork arXiv:q-bio/0503028
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Have him in circles
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Alex Nelson

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Problem #1.
As we all know, Galileo famously holed himself up in the tower of Pisa in 1589 when the Pope's tax collectors came for his due. And Galileo -- the prototypical Tea Partier -- heroically threw spheroids of various composition upon the tax collectors below. How long does it take for one such ball to hit the ground? (Assume initial velocity is 40.233 meters per second)

Problem #2.
When Galileo ran out of stuff to bombard the tax collectors with, some sources claim he tripped and fell on the tax collectors below. (Don't worry, Galileo was fine.) If he was actually pushed with some initial velocity 10 meters per second horizontally, how far from the tower will he get?

Problem #3.
Suppose while holed up in the tower of Pisa, Galileo had access to a motorcycle and ramp and tried to jump the distance from the leaning tower to the Cathedral. What angle relative to the ground must the ramp be inclined? The distance is 36.055 meters from the tower to the Cathedral.
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+Jan Moren I actually was trying to show a student how physics problems "build off each other". If we algebraically solve each of these problems, we can recover previous solutions taking appropriate limits :)
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The selected papers network website appears to be down at the moment. To whom do I direct my angry emails?
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There are a lot of molocules in biology to keep track of...how can one man do it? With the great new energy drink CaFaProN which combines the stimulants in Prawn with the savory flavor of Coffee.

No, it's a mnemonic, but now that you have "Shrimp+Coffee energy drink" stuck in your head, you can't forget it! It stands for:

Ca: Carbohydrates (e.g. sugars)

Fa: Fats (e.g. lipids which form the boundary to cells, cholestoral, steroids)

Pro: Proteins (which form the lego-bricks for most of subcellular apparati, formed from amino acids)

N: Nucleic Acids (e.g., DNA and RNA)
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The famous Kourovka Notebook of group theory problems appears now freely online!

http://arxiv.org/abs/1401.0300
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I hope your Holidays had a lot less truck-driving than mine!
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People
Have him in circles
664 people
Work
Occupation
Mathematician/Programmer/Oracle
Employment
  • Unfold, Inc.
    Software Developer, 2012 - present
    I program in Clojure (Lisp for JVM), do numerical analysis, predict how congress will vote, analyze the Syrian Civil War, and much much more!
  • University of California, Davis
    Student, Researcher, 2006 - 2011
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Los Angeles, California
Previously
Davis, California - Glendale, California - Dublin, Ireland - Belfast, Northern Ireland - Padua, Italy
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Tagline
They call me "Tractor Man"
Introduction
I'm a mathematical physicist (more on the mathematical side) with interests in category theory, monstrous moonshine, number theory, Diophantine approximations, super symmetry, Lie groups, differential geometry, and other topics. On the physical side, I'm intrigued by quantization of gauge systems, Quantum Field Theory, the mathematical underpinnings of particle physics, classical and quantum gravity.

I've been to Nottingham, England in July 2008 to attend Quantum Gravity and Quantum Geometry 2; and I've attended "Algebra and Topology in Interaction" during September 2009, in honour of Dr Fuchs' Birthday.

Starting June 2009 until June 2010, I did undergraduate research with Derek Wise with funding from VIGRE. We worked on Chain Field Theory in discrete spacetimes.

In April 2010 I was asked to peer review for the International Journal of Physical Sciences.

August 2010 I studied abroad at Trinity in Dublin, and Queen's University in Belfast.

In June 2011, I attended "Quantum Geometry and Quantum Gravity" in Zurich, Switzerland; then in July I went to the "Category Theory 2011" conference in Vancouver.

February 2012, I attended "
30th Annual Western States Mathematical Physics Meeting" at Caltech.
Education
  • University of California, Davis
    Mathematics, 2006 - 2011
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Male
Other names
Alexander Nelson