mad mathematician's latest activity
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mad mathematician replied to the thread Undergrad Infinite number of spatial dimensions (maybe also time dimensions).but spacetime in QM isn't inifinite dimensional in spatial coordinates. -
mad mathematician posted the thread Undergrad Infinite number of spatial dimensions (maybe also time dimensions) in Beyond the Standard Models.How would one build mathematically an infinite number of spatial dimensions theory? I can concieve mathematically an n-th vector or...
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mad mathematician replied to the thread Undergrad The Universe is No Simulation.As for Sokal-like hoax I don't really know. I mean Bogdanov brothers got their doctor diplomas for a nonsense-type of publication. So...
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mad mathematician replied to the thread Undergrad The Universe is No Simulation.The classical computer is binary. As for Boolean algebra, it seems there are several Boolean algebras; in Machover and Bell there's a...
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mad mathematician replied to the thread Undergrad The Power of QM and QFT.Well you have two options Quantum vs Classical. Now infinities are all over physics (classical and quantum), the self energy of an...
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mad mathematician reacted to renormalize's post in the thread Graduate How to fix Relativistic QM so it's consistent? with
Like.
The following is taken from Bjorken and Drell, Relativistic Quantum Mechanics (1964), pp. 5-6: So the problem with the Klein-Gordon... -
mad mathematician replied to the thread Graduate How to fix Relativistic QM so it's consistent?.What do you mean "apply it to Klein Gordon"? do you mean we assume that if psi satisfies KG then psi doesn't satisfy the conservation...
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mad mathematician replied to the thread Graduate How to fix Relativistic QM so it's consistent?.What's bad with energy being conserved? Was there an attempt to replace SR with GR in RQM? or is LQG such an attempt, i.e they don't use...
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mad mathematician replied to the thread Graduate How to fix Relativistic QM so it's consistent?.Don't we have already such a PDF? Absolute value squared of the wave function of a particle.
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mad mathematician posted the thread Graduate How to fix Relativistic QM so it's consistent? in Beyond the Standard Models.What attempts have been to resurrect RQM (in order to ditch the fields' notion)? Besides the appearance of negative energies (which I...
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mad mathematician replied to the thread Undergrad Formal derivation of statement from Peano Arithmetic system.When you say that you use a Hilbert system without natural deduction, do you mean that you can't use rules that are specific to the...
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mad mathematician replied to the thread Undergrad Formal derivation of statement from Peano Arithmetic system.In my derivation I forgot to mention that I use y+0=y; acknowledged we proved already x+(y+z)=(x+y)+z plug z=0, and get...
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mad mathematician replied to the thread Undergrad Formal derivation of statement from Peano Arithmetic system.You want to use A4 to prove associativity of addition, so we have for z=1: (x+y)+1=x+(y+1) this is an instantiation of axiom A4. Now we...
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mad mathematician replied to the thread Undergrad Formal derivation of statement from Peano Arithmetic system.You need to use induction on z and to invoke an instance of A4.
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mad mathematician reacted to dextercioby's post in the thread Quantum "WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians with Like.
Speaking of Folland's books, they are notorious for typos. Here's the errata for his 1st edition of the QFT book.