vegas
-----

The ``vegas`` package is for evaluating multidimensional integrals using
an improved version of the adaptive Monte Carlo vegas algorithm
(G. P. Lepage, J. Comput. Phys. 27(1978) 192).
A tutorial on its use can be found in the documentation:
see ``doc/html/index.html`` or <https://vegas.readthedocs.io>.

The ``vegas`` algorithm has been widely used for decades to evaluate
integrals of 2 or more dimensions numerically. It is particularly
well suited to higher dimensions (e.g., 9 or 10 for Feynman diagram
evaluation). The algorithm in this package is significantly
improved over the original ``vegas`` implementation. In particular
a second adaptive strategy has been added. It also supports
multi-processor evaluation of integrands.

The new algorithm (``vegas+``) is described in G. P. Lepage, 
<https://arxiv.org/abs/2009.05112>
(J. Comput. Phys. 439 (2021) 110386).

See the ``INSTALLATION`` file for installation directions.
Test ``vegas`` using ``make tests``. Some simple examples are
in the ``examples/`` subdirectory.

``vegas`` version numbers have the form ``major.minor.patch`` where
incompatible changes are signaled by incrementing the ``major`` version
number, the ``minor`` number signals new features, and the ``patch``
number signals bug fixes.


| Created by G. Peter Lepage (Cornell University) 2013
| Copyright (c) 2013-2023 G. Peter Lepage

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