Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is Entropy Associated with Time's Arrow?   We start with reviewing the origin of the idea that entropy and the Second
Law are associated with the Arrow of Time. We then introduced a new definition
of entropy based on Shannons Measure of Information, SMI. The SMI may be
defined on any probability distribution, and therefore it is a very general
concept. On the other hand entropy is defined on a very special set of
probability distributions. More specifically the entropy of a thermodynamic
system is related the probability distribution of locations and velocities or
momenta of all the particles, which maximized the Shannon Measure of
Information. As such, entropy is not a function of time. We also show that the
H function, as defined by Boltzmann is an SMI but not entropy. Therefore, while
the H-function, as an SMI may change with time, Entropy, as a limit of the SMI
does not change with time.

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The categories of this paper are: chem-ph
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The categories of this paper are: eess
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an