Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NIFTY - Numerical Information Field Theory - a versatile Python library
  for signal inference   NIFTY, "Numerical Information Field Theory", is a software package designed
to enable the development of signal inference algorithms that operate
regardless of the underlying spatial grid and its resolution. Its
object-oriented framework is written in Python, although it accesses libraries
written in Cython, C++, and C for efficiency. NIFTY offers a toolkit that
abstracts discretized representations of continuous spaces, fields in these
spaces, and operators acting on fields into classes. Thereby, the correct
normalization of operations on fields is taken care of automatically without
concerning the user. This allows for an abstract formulation and programming of
inference algorithms, including those derived within information field theory.
Thus, NIFTY permits its user to rapidly prototype algorithms in 1D, and then
apply the developed code in higher-dimensional settings of real world problems.
The set of spaces on which NIFTY operates comprises point sets, n-dimensional
regular grids, spherical spaces, their harmonic counterparts, and product
spaces constructed as combinations of those. The functionality and diversity of
the package is demonstrated by a Wiener filter code example that successfully
runs without modification regardless of the space on which the inference
problem is defined.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th