Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Definitions of distance function in radial basis function approach   Very few studies involve how to construct the efficient RBFs by means of
problem features. Recently the present author presented general solution RBF
(GS-RBF) methodology to create operator-dependent RBFs successfully [1]. On the
other hand, the normal radial basis function (RBF) is defined via Euclidean
space distance function or the geodesic distance [2]. This purpose of this note
is to redefine distance function in conjunction with problem features, which
include problem-dependent and time-space distance function.

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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org