Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lexicase Selection of Specialists   Lexicase parent selection filters the population by considering one random
training case at a time, eliminating any individuals with errors for the
current case that are worse than the best error in the selection pool, until a
single individual remains. This process often stops before considering all
training cases, meaning that it will ignore the error values on any cases that
were not yet considered. Lexicase selection can therefore select specialist
individuals that have poor errors on some training cases, if they have great
errors on others and those errors come near the start of the random list of
cases used for the parent selection event in question. We hypothesize here that
selecting these specialists, which may have poor total error, plays an
important role in lexicase selection's observed performance advantages over
error-aggregating parent selection methods such as tournament selection, which
select specialists much less frequently. We conduct experiments examining this
hypothesis, and find that lexicase selection's performance and diversity
maintenance degrade when we deprive it of the ability of selecting specialists.
These findings help explain the improved performance of lexicase selection
compared to tournament selection, and suggest that specialists help drive
evolution under lexicase selection toward global solutions.

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The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat