Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: COBE-DMR constraints on the nonlinear coupling parameter: a wavelet
  based method   Nonlinearity introduced in slow-roll inflation will produce weakly
non-Gaussian CMB temperature fluctuations. We have simulated non-Gaussian large
scale CMB maps (including COBE-DMR constraints) introducing an additional
quadratic term in the gravitational potential.The amount of nonlinearity being
controlled by the so called nonlinear coupling parameter f_{nl}. An analysis
based on the Spherical Mexican Hat wavelet was applied to these and to the
COBE-DMR maps. Skewness values obtained at several scales were combined into a
Fisher discriminant. Comparison of the Fisher discriminant distributions
obtained for different nonlinear coupling parameters with the COBE-DMR values,
sets a constraint of abs(f_{nl})<1100 at the 68% confidence level. This new
constraint being tighter than the one previously obtained by using the
bispectrum by Komatsu et al. (2002).

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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat