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/usr/share/doc/libpetsc-complex-3.6/copyright is in libpetsc-complex-3.6 3.6.2.dfsg1-3ubuntu1.

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Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: PETSc
Source: http://www.mcs.anl.gov/petsc/
Files-Excluded: bin/win32fe/*
                docs/*.pdf
		src/ts/examples/tutorials/power_grid/PDF_eqs_power_grid.pdf

Files: *
Copyright: (c) 1991-2014, UChicago Argonne, LLC and the PETSc Development Team
License: BSD-2-clause
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 .
 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this
   list of conditions and the following disclaimer in the documentation and/or
   other materials provided with the distribution.
 .
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .
 .
 This license DOES NOT apply to any software that may be obtained via the
 --download-package option of the PETSc configuration. Each of those
 packages are covered by their own licenses.