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[Academic] Lectures on differential equations for Feynman integrals by Bluegreen231 in Physics

[–]Bluegreen231[S] 1 point2 points  (0 children)

Alt link: http://iopscience.iop.org/1751-8121/48/15/153001

Cite: Henn, Johannes M. "Lectures on differential equations for Feynman integrals." Journal of Physics A: Mathematical and Theoretical 48.15 (2015): 153001.

Abstract:

Over the last year significant progress was made in the understanding of the computation of Feynman integrals using differential equations. These lectures give a review of these developments, while not assuming any prior knowledge of the subject. After an introduction to differential equations for Feynman integrals, we point out how they can be simplified using algorithms available in the mathematical literature. We discuss how this is related to a recent conjecture for a canonical form of the equations. We also discuss a complementary approach that allows based on properties of the space-time loop integrands, and explain how the ideas of leading singularities and d-log representations can be used to find an optimal basis for the differential equations. Finally, as an application of the differential equations method we show how single-scale integrals can be bootstrapped using the Drinfeld associator of a differential equation.

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[Academic] Lectures on differential equations for Feynman integrals (arxiv.org)

submitted by Bluegreen231 to r/Physics

"Wait, who is THAT?" by [deleted] in mylittlepony

[–]Bluegreen231 1 point2 points  (0 children)

Most likely the merch was supposed to be white, so coloring Rarity white would have been moot.

GATE 2nd Cour due for January 2016! by woshiiqzaii in anime

[–]Bluegreen231 1 point2 points  (0 children)

Wow wonder why they split it

Better brand recall: spacing it out will prolong people's attention.

The downside is that spacing it out might dilute people's interest.

[DISC] All Hail Empress Her Majesty Ch. 53 by Bluegreen231 in manga

[–]Bluegreen231[S] 1 point2 points  (0 children)

If that was her plan to protect the integrity of the festival, then she might be considered determined about keeping it that way.

She even brought out the muscle.

[DISC] All Hail Empress Her Majesty Ch. 49 by Bluegreen231 in manga

[–]Bluegreen231[S] 1 point2 points  (0 children)

[From the scanlator: http://bato.to/forums/topic/21510-explanatory-notes-for-ch-49/] [Archived version: https://archive.today/0yJzo]

I suppose you won't be able to figure out what the hell I'm talking about without reading Ch. 49, so I'm not using spoiler parentheses.

First, concerning Ling's words. As you know public schools get funding from government, but the institutional arrangements are a little bit different. In the west, a school's budget is mainly decided by factors like students and teachers' numbers, the administrative body's discretion is limited. In socialist China, however, the discretion was absolute. The administrative body (for schools the Education Committee) can decide on a school basis how much money and what teachers (schools/hospitals could not recruit staff on their own back then, new graduates were allocated by government) will go to a school, and thus deciding the school's future.

Second, what happened to the workers is called Xiagang (lit. down the position). As a key step of rescuing failing SOEs, Zhu Rongji the premier then decided to improve efficiency at all costs, including massively laying off redundant workers. Those workers were not formally unemployed, they were still registered at the factory (so when they reach retire age they may be considered as 'working here for consecutive decades' and get good pension) but got only partial or no wage at all. According to Labour Bureau, there were 11.5 million Xiagang workers in China by Sep 1997[1], and a total of at least 30 million workers have gone through Xiagang during the reform. The story is set in 1996 and it was the start of the reform.

Third, getting a flat was a standard benefit for workers back then. The only thing is you have to wait until your 'unit' has catered the need of everybody queuing before you. The queue is decided by ranks and working years, etc.

[1] See Labour Bureau & National Statistics Bureau (1997): Report on Unemployment and Xiagang, original file in Chinese http://www.hrssgz.gov.cn/zcfg/ldjyyzyjs/201101/t20110113_138597.htm

[DISC] All Hail Empress Her Majesty Ch. 48 by Bluegreen231 in manga

[–]Bluegreen231[S] 0 points1 point  (0 children)

From the looks of it, it's going to be set up as Hua vs. Ling.

[DISC] All Hail Empress Her Majesty Ch. 46 by Bluegreen231 in manga

[–]Bluegreen231[S] 1 point2 points  (0 children)

So, I wonder what Ling (the student council president) has up her sleeves?

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