Applied Books on complex valued functions and solution of PDE

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The discussion focuses on the mathematical study of complex-valued distributions, particularly in relation to spherical harmonics and their properties. It highlights the transition from classical mechanics, where solutions are typically curves, to quantum mechanics, where solutions manifest as distributions of complex functions. The conversation also touches on the nature of solutions in mechanics versus those in quantum mechanics, emphasizing that while classical mechanics allows for a range of energies, quantum mechanics yields discrete states from differential equations. The thread recommends A. Sommerfeld's "Lectures on Theoretical Physics vol. 6" as an introductory resource for understanding these concepts in partial differential equations.
jonjacson
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Hello folks,

1.- In geometry we study for example the conic sections, their exentricity and properties. I was wondering what part of the mathematical science studies the different properties of complex valued distributions. One example are the spherical armonics. I guess mathematicians have studied this.

Let's say this in other words, in Classical Mechanics the solution of the equations are the orbits, that are normally curves on the plane, but when you study quantum mechanics the solutions are distributions of complex valued functions. I know there are few analytical solutions, but I want to learn about other distributions that are analytical.

2.- When you study mechanics all the energies are allowed, but if you study membranes or chords only certain patterns are allowed. In Quantum mechanics the solutions of the differential equations are a set of discrete states. What part of math in general studies this particular differential equations that have a discrete set of functions as solutions?
 
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The best introductory book on these questions is

A. Sommerfeld, Lectures on Theoretical Physics vol. 6, Partial Differential Equations, Academic Press 1949
 
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For the following four books, has anyone used them in a course or for self study? Compiler Construction Principles and Practice 1st Edition by Kenneth C Louden Programming Languages Principles and Practices 3rd Edition by Kenneth C Louden, and Kenneth A Lambert Programming Languages 2nd Edition by Allen B Tucker, Robert E Noonan Concepts of Programming Languages 9th Edition by Robert W Sebesta If yes to either, can you share your opinions about your personal experience using them. I...
This is part 2 of my thread Collection of Free Online Math Books and Lecture Notes Here, we will consider physics and mathematical methods for physics resources. Now, this is a work in progress. Please feel free comment regarding items you want to be included, or if a link is broken etc. Note: I will not post links to other collections, each link will point you to a single item. :book:📚📒 [FONT=trebuchet ms]Introductory college/university physics College Physics, Openstax...

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