107,007 reputation
7152307
bio website motls.blogspot.com
location Czech Republic
age 41
visits member for 3 years, 11 months
seen 1 hour ago

Hi, I am a string theorist and a publicist.


May
16
comment How is a magnetic field translated into physical force?
@qftme, haha, you're having fun that someone could be tortured by an unanswerable question, right? Feynman was asked the same question, why magnets work, and after some confused babbling - and successful efforts to regulate his anger about the stupidity of the author of the question - he said the right thing, that it's the wrong question because the magnetic forces are fundamental while what the asker can imagine and knows is not fundamental: youtube.com/watch?v=wMFPe-DwULM
May
16
comment Incommensurability between different observers describing the same universe?
Tx for your refinement, Jerry. Still, one can't get out of the black hole.
May
16
comment Equations for bent paper
Dear @yayu, the $(y')^2$ term vanishes if the paper is straight. If it is curved at a given point $x$, the term is nonzero. It's quadratic because you may really imagine that there are springs on both sides of the paper, trying to keep is straight, and the $(y')^2$ term generalizes the $kx^2/2$ potential energy of a spring.
May
16
revised Equations for bent paper
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May
16
comment Equations for bent paper
Dear ysap, excellent to hear about it. But is it really intuition, or just plain good old memory that remembers someone else's intuition or, more likely, calculation? ;-)
May
16
answered Equations for bent paper
May
16
revised Incommensurability between different observers describing the same universe?
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May
16
comment Incommensurability between different observers describing the same universe?
Is there some reason why you create a new account for every new question (or, one could say, a new copy of your question)?
May
16
revised Incommensurability between different observers describing the same universe?
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May
16
answered Incommensurability between different observers describing the same universe?
May
16
comment Why is it hard to solve the Ising-model in 3D?
One may work on something without knowing some essential insights about those matters that were found in the last 25 years but that doesn't mean that his work may be a world quality work as of 2011. It can't.
May
16
comment Why is it hard to solve the Ising-model in 3D?
Dear @Marek, you have no clue what you're talking about. Non-conformal versions of theories such as the Ising model, when they're integrable, may be shown to be integrable by their being deformations of the conformal theories whose integrability is guaranteed by the conformal symmetry, and the integrability survives after the deformation. See e.g. arxiv.org/abs/hep-th/9312169 and especially its reference 1 by Zamoldchikov and hundreds of other papers about similar issues e.g. scholar.google.com/…
May
16
revised Feedback on the paper, 'CCC-predicted low-variance circles in CMB sky and LCDM' by V. G. Gurzadyan and R. Penrose
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May
16
comment Feedback on the paper, 'CCC-predicted low-variance circles in CMB sky and LCDM' by V. G. Gurzadyan and R. Penrose
Moreover, as far as my reading of the critical papers against the CCC goes, none of them articulates why conceptually there can't be any patterns of a similar kind beyond the spectral curve, so they're destined to write new critical papers - and recalculate their things using the full WMAP maps - whenever Penrose and Gurzadyan modify their prescription how to "see" their circles etc. This is really unnecessary. The attempt to find any patterns of this kind using these methods is fundamentally misguided.
May
16
comment Feedback on the paper, 'CCC-predicted low-variance circles in CMB sky and LCDM' by V. G. Gurzadyan and R. Penrose
Thanks a lot for these words. Robert. I could have made it more comprehensible but it would require lots of optimizations. Yes, people are bounded by so many sociological constraints and groupthink. In fact, one can't even learn that in the privacy of their offices, everyone knows that e.g. these papers by Penrose and Gurzadyan are wrong. But everyone chooses not to say it - because Penrose is a popular and famous chap and no one wants to stand against popular things.
May
16
comment Why do 'dead' batteries work again after exchanging the places of the batteries in an electronic device?
What probably matters most is that you waited for a fwe minutes. A battery can "revive" itself by distributing the material more conveniently. You may think that a nearly dead battery suffers from congestion, hiding some useful material behind the material that is discharged, but it gets cured when you wait for a while.
May
15
reviewed Approve What is the most natural definition of the weak hypercharge coupling constant if grand unification is wrong?
May
15
comment What is an observer in quantum mechanics?
A nice secret way to promote the logic of decoherence without using the word, +1. ;-)
May
15
revised How to define angular momentum in other than three dimensions?
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May
15
revised Feedback on the paper, 'CCC-predicted low-variance circles in CMB sky and LCDM' by V. G. Gurzadyan and R. Penrose
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