Stack Exchange

Arnold Neumaier

Vienna, Austria

mat.univie.ac.at/~neum

Some physics material I wrote:

  • A theoretical physics FAQ
  • Classical and Quantum Mechanics via Lie algebras
  • Renormalization without infinities - an elementary tutorial
  • Classical and quantum field aspects of light
  • Optical models for quantum mechanics
  • Molecular modeling of proteins and mathematical prediction of protein structure

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    Top Questions
    Top Answers
    18
    What differs string theory from philosophy or religion?
    physics.stackexchange.com

    17
    Is time continuous?
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    17
    Scientific standards for numerical errors
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    14
    Solving $(G^TA^{-1}G)x = b$ without inverting $A$
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    13
    Are quantum mechanics calculations useful for engineering?
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    12
    Prove that negative absolute temperatures are actually hotter than positive absolute temperatures
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    12
    Are W & Z bosons virtual or not?
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    12
    What is the fastest way to calculate the largest eigenvalue of a general matrix?
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    12
    MATLAB matrix multiplication (the best computational approach)
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    11
    Meaning of search methods and optimization methods
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    11
    Algorithms for linear system of ODEs
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    9
    Difficulties with bra-ket notation
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    9
    Approximate spectrum of a large matrix
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    8
    Irreducible representation in physics
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    8
    The square in the Newton's law of universal gravitation is really a square?
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    8
    Can $10^{23}$ stars be treated with methods of statistical mechanics?
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    8
    Canonical Commutation Relations
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    8
    Parallel algorithm for eigensystem of a tridiagonal matrix
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    8
    Generating Symmetric Positive Definite Matrices using indices
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    8
    Gershgorin Circle Theorem to estimate the eigenvalues
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    8
    How to detect the multiplicity for the eigenvalues?
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    8
    How can I approximate an improper integral?
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    8
    Testing numerical optimization methods: Rosenbrock vs. real test functions
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    8
    Eigenvectors with the Power Iteration
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    8
    Catastrophic cancellation in logsum
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    7
    Given entanglement, why is it permissible to consider the quantum state of subsystems?
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    7
    What are the frameworks of physics?
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    7
    In astronomy what phenomena have theory predicted before observations?
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    7
    How to get Planck length
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    7
    Path integral vs. measure on infinite dimensional space
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