## Profile

Alex Nelson
Works at Unfold, Inc.
Attended University of California, Davis
Lives in Los Angeles, California
852 followers|39,914 views

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### Alex Nelson

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Today I learned that the set membership symbol is a stylized lowercase Greek letter epsilon ("ε"), the first letter of the word ἐστί [Gk esti], which means "is".

Curiously, in type theory, when we write a term t has type Type, we use a colon "_t_ : Type". That colon is sometimes referred to, in the older literature from the '70s and early '80s, as "esti".

#GreekLife #GeekLife﻿
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Cool!  I foolishly never wondered why epsilon was used.  ﻿

### Alex Nelson

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Abstract: We reconsider perturbative unitarity in quantum field theory and upgrade several arguments and results. The minimum assumptions that lead to the largest time equation, the cutting equations and the unitarity equation are identified. Using this knowledge and a special gauge, ...
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### Alex Nelson

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Oxford has its math department put lecture notes online, I should peruse this later...

https://www0.maths.ox.ac.uk/courses/material﻿
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### Alex Nelson

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"I believe that we are lost here in America, but I believe we shall be found. And this belief, which mounts now to the catharsis of knowledge and conviction, is for me — and I think for all of us — not only our own hope, but America's everlasting, living dream."

— Thomas Wolfe, You Can't Go Home Again (1941)﻿
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### Alex Nelson

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The bill of particulars against Linda Katehi, the suspended chancellor of UC Davis, certainly is eye-opening.
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R.F. Streater has famously written, with Wightman, the book PCT, Spin and Statistics, and all that. Dr Streater also compiled a list of lost causes in Physics, which ironically has been almost lost due to his personal page being taken down. The Internet Archive has saved them, however! They are available here: https://web.archive.org/web/20160209122140/http://www.mth.kcl.ac.uk/~streater/lostcauses.html

Some issues have been "regained", in another "almost lost" list: https://web.archive.org/web/20150320183301/http://www.mth.kcl.ac.uk/~streater/regainedcauses.html

They're an interesting read to peruse, both sites, and I'm glad that they're archived somewhere.﻿
Lost Causes in Theoretical Physics. by R. F. Streater. This page contains some remarks about research topics in physics which seem to me not to be suitable for students. Sometimes I form this view because the topic is too difficult, and sometimes because it has passed its do-by date.
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### Alex Nelson

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Abstract: We study resurgence properties of partition function of SU(2) Chern-Simons theory (WRT invariant) on closed three-manifolds. We check explicitly that in various examples Borel transforms of asymptotic expansions posses expected analytic properties. In examples that we study we observe ...
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### Alex Nelson

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will teach me to ride a motorcycle. For those of you missing out, here's what it looks like...

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### Alex Nelson

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Abe Lincoln liked to tell story about a Baptist minister in Indiana:

“The meeting-house was in the woods and quite a distance from any other house. It was only used once a month. The preacher – an old line Baptist – was dressed in coarse linen pantaloons, and shirt of the same material. The pants, manufactured after the old fashion, with baggy legs and a flap in front, were made to attach to his frame without the aid of suspenders. A single button held his shirt in position, and that was at the collar.

“He rose up in the pulpit and with a loud voice announced his text thus: ‘I am the Christ, whom I shall represent today.’ About this time a little blue lizard ran up underneath his baggy pantaloons. The old preacher, not wishing to interrupt the steady flow of his sermon, slapped away on his legs, expecting to arrest the intruder; but his efforts were unavailing, and the little fellow kept on ascending higher and higher. Continuing the sermon, the preacher slyly loosened the central button which graced the waist-band of his pantaloons and with a kick off came that easy-fitting garment.

“But meanwhile Mr. Lizard had passed the equatorial line of waist-band and was calmly exploring that part of the preacher’s anatomy which lay underneath the back of his shirt. Things were now growing interesting, but the sermon was still grinding on. The next movement on the preacher’s part was for the collar button, and with one sweep of his arm off came the tow linen shirt.

“The congregation sat for an instant as if dazed; at length one old lady in the rear of the room rose up and glancing at the excited object in the pulpit, shouted at the top of her voice: ‘If you represent Christ then I’m done with the Bible.’”﻿
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### Alex Nelson

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Abstract: A Hilbert manifold structure is described for the ADM phase space of asymptotically flat initial data $(g,\pi)$ with local $H^2\times H^1$ Sobolev regularity. Solutions of the constraint equations form a Hilbert submanifold. A regularized RT Hamiltonian is defined and smooth on the ...
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### Alex Nelson

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Abstract: It has been known for some time that the cosmological Friedmann equation deduced from General Relativity can be also obtained within the Newtonian framework under certain assumptions. We use this result together with quantum corrections to the Newtonian potentials to derive a set a of ...
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Homer (singing loudly): I FEEL LIKE MAKING LOVE! FEEL LIKE MAKING LOVE TO YOU!

Ned (nervously): It's a catchy song alright...you really wrote it?

Homer: Yeah. For Princess Di...

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People
In his circles
113 people
Have him in circles
852 people
Communities
8 communities
Education
• University of California, Davis
Mathematics, 2006 - 2011
Basic Information
Gender
Male
Other names
Alexander Nelson
• Futurama
Story
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.
Bragging rights
Hardest working man in show business.
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
Places
Currently
Los Angeles, California
Previously
Davis, California - Glendale, California - Dublin, Ireland - Belfast, Northern Ireland - Padua, Italy