bhobba's latest activity
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Any relativistic quantum field theory needs an underlying globally hyperbolic manifold. -
bhobba reacted to Mark44's post in the thread Undergrad Ambiguity of the term "indefinite integral" with
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For 1, this is part of the Fundamental Theorem of Calculus. For 2, if F(x) is an antiderivative of f(x), then so too will F(x) + C be... -
bhobba reacted to jedishrfu's post in the thread Undergrad Ambiguity of the term "indefinite integral" with Like.
I've always thought of indefinite integrals as ones with unspecified integration limits. Wikipedia gets into it in more detail...
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View from the other end of the tunnel: Having learned my basic Maths in the 50s ,I was taught how to use log tables and the 'rules' of...
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bhobba reacted to Roberto Pavani's post in the thread Undergrad Why is gravity a fictitious force? with Like.
Fair point. I should have said 'gravitational force', not 'gravity'. The distinction is precisely the one between Christoffel symbols...
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bhobba reacted to Demystifier's post in the thread Undergrad Why is gravity a fictitious force? with Like.
Gravity, of course, is not fictitious because the Riemann curvature is a tensor. But gravity is not the same thing as gravitational...
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bhobba reacted to jbriggs444's post in the thread High School Why is the growth of exps & logs so fast & slow, respectively? with Like.
Let us take the latter question first: "How does the proof imply the steady growth of ##\ln x##? What do you even mean by the "steady...
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This has several excellent answers and I cannot improve on them. I just have this persistent nagging voice wanting to express this...
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bhobba replied to the thread Undergrad Why ##a^0=1##?.Starting from the beginning, using basic calculus. If f(x) = x^i where i is an integer. df/dx = i*x^(i-1). ∫(x^i)dx =...
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bhobba reacted to gentzen's post in the thread High School Electron absorbs photon, but what happens to the photon? with Like.
I guess you both are making the third step before the first. If you are in a high energy particle physics context and study an effect...
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bhobba reacted to PeterDonis's post in the thread High School Electron absorbs photon, but what happens to the photon? with Like.
The OP question has been sufficiently addressed and the thread will remain closed. Thanks to all who participated.
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bhobba replied to the thread Is the quantum wave function a real object or a mathematical tool?.It isn't, and there are errors that the more advanced will see as strictly speaking wrong (e.g., ordinary QM is the classical limit of...
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bhobba reacted to gentzen's post in the thread Is the quantum wave function a real object or a mathematical tool? with Like.
Art Hobson certainly makes strong claims: Whether his evidence is strong enough to back those claims might be a topic for another...
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bhobba reacted to gentzen's post in the thread High School Electron absorbs photon, but what happens to the photon? with Like.
https://web.archive.org/web/20250621015925/https://www.physics.usu.edu/torre/3700_Spring_2015/What_is_a_photon.pdf
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bhobba replied to the thread Is the quantum wave function a real object or a mathematical tool?.. Strictly speaking, probably true. However, Art Hobson gives strong evidence that they are real in the usual sense physicists think...