Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accurate exchange energy and total energy for excited states: Inclusion
  of gradient correction   We present an approach for accurate calculation of exchange energy and total
energy for excited states using time independent density functional formalism.
This is done by inclusion of gradient correction into the excited state
exchange energy functionals developed by us. We have incorporated Becke and
Perdew Wang corrections into our functional and have studied various types of
excited states having one and two gaps in occupation of orbitals.

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The categories of this paper are: chem-ph
1
The categories of this paper are: cs
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The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: ao-sci