Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Testing gaussianity, homogeneity and isotropy with the cosmic microwave
  background   We review the basic hypotheses which motivate the statistical framework used
to analyze the cosmic microwave background, and how that framework can be
enlarged as we relax those hypotheses. In particular, we try to separate as
much as possible the questions of gaussianity, homogeneity and isotropy from
each other. We focus both on isotropic estimators of non-gaussianity as well as
statistically anisotropic estimators of gaussianity, giving particular emphasis
on their signatures and the enhanced "cosmic variances" that become
increasingly important as our putative Universe becomes less symmetric. After
reviewing the formalism behind some simple model-independent tests, we discuss
how these tests can be applied to CMB data when searching for large scale
"anomalies"

10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
18
The categories of this paper are: econ
19
The categories of this paper are: eess