bhobba's latest activity
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bhobba reacted to anuttarasammyak's post in the thread Undergrad Finding the minimum distance between two curves with
Love.
continued from #2: With the help of Wolfram I get one real solution... -
bhobba reacted to Charles Link's post in the thread Undergrad Finding the minimum distance between two curves with
Like.
@anuttarasammyak That's one part of what I did to solve it. Those two partial derivative expressions are really too clumsy to solve... -
bhobba reacted to anuttarasammyak's post in the thread Undergrad Finding the minimum distance between two curves with Like.
Square of the distance is $$L^2=(y_1-y_2)^2+(x_1-x_2)^2=(4-x_1^2-(x_2-3)^2)^2+(x_1-x_2)^2$$ The condition of minimum is $$\frac{\partial...
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bhobba reacted to DavidL070949's post in the thread Help with problem in MIT open course general relativity with Love.
All of this is very helpful indeed! I'm going to try to work through the details on my own, so that I make sure I really understand and...
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bhobba reacted to DavidL070949's post in the thread Help with problem in MIT open course general relativity with Like.
Apologies for the delay, but I'm still getting used to LaTex. Anyway, in answer to how I got to the expression(s) that left me stuck...
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bhobba reacted to A. Neumaier's post in the thread Undergrad A Heuristic View of QM: Axioms & Gleason's Theorem with Like.
For most of quantum mechanics you need the canonical commutation relations. This was Heisenberg's starting point, and cannot be deduced...
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bhobba reacted to CoolMint's post in the thread Undergrad A Heuristic View of QM: Axioms & Gleason's Theorem with
Skeptical.
Mathemeatics is not invented but discovered. Evidently it underlies the relationships that eventually turn into observations and this is... -
bhobba reacted to Demystifier's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
I don't think that that's what the relational interpretation says. The crucial issue is the interpretation of entanglement, because...
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bhobba reacted to martinbn's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
That the particles, fields, atoms, molecules and so on, exist and interact with each other. By the way I think that the analogy with...
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bhobba reacted to Demystifier's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
Are you saying that relational QM has a clear ontology? If you do, what is it?
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bhobba reacted to gentzen's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
Careful, he only said "associated with Hugh Everett". Since Coleman is very careful with words, this means that he is not claiming to...
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bhobba reacted to Demystifier's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
If the geocentric model preferred by the catholic church is the metaphor for the orthodox interpretation of QM, then the heliocentric...
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bhobba reacted to Demystifier's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
I don't know whether Coleman's position contains something original, but there is something else that I find problematic. Coleman first...
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bhobba reacted to gentzen's post in the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture with Like.
pines-demon quoted from Sidney Coleman's Dirac Lecture "Quantum Mechanics in Your Face" (https://arxiv.org/abs/2011.12671) and martinbn...
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bhobba reacted to PeterDonis's post in the thread Graduate Why does QM split into two evolution types? with Like.
It's not. It's a matter of "that's how we make accurate predictions". That's how any physical theory works: you figure out what...