<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div><div class=""><span style="font-size: 13px;" class="">We are pleased to announce the release of PETSc version 3.15 at </span><a href="http://www.mcs.anl.gov/petsc/download" style="font-size: 13px;" class="">http://www.mcs.anl.gov/petsc/download</a><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">For those who use the git maint branch this branch is now named release to reflect that it contains the current release. You can switch to the new release with</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">git fetch</span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">git checkout release</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">A list of the major changes and updates can be found at </span><a href="http://www.mcs.anl.gov/petsc/documentation/changes/315.html" style="font-size: 13px;" class="">http://www.mcs.anl.gov/petsc/documentation/changes/315.html</a><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">The final update to petsc-3.14 i.e petsc-3.14.6 is also available</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">We recommend upgrading to PETSc 3.15 soon. As always, please report problems to petsc-maint at </span><a href="http://mcs.anl.gov" style="font-size: 13px;" class="">mcs.anl.gov</a><span style="font-size: 13px;" class=""> and ask questions at petsc-users at </span><a href="http://mcs.anl.gov" style="font-size: 13px;" class="">mcs.anl.gov</a><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">This release includes contributions from</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Albert Cowie </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Alexei Colin </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">AlexisMarb </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Ali Reza Khaz'ali </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Alp Dener </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Barry Smith </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Blaise Bourdin </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Connor Ward </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Damian Marek </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Ed Bueler </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Emil Constantinescu </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Eric Chamberland </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Fande Kong </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Hong Zhang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jacob Faibussowitsch </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jed Brown </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jonathan Lambrechts </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jose Roman </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Junchao Zhang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Kaushik Kulkarni </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Koki Sagiyama </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Lawrence Mitchell </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Lisandro Dalcin </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Mara Arts </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Mark Adams </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Massimiliano Leoni </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Matthew Knepley </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Matthew McGurn </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Miguel Salazar De Troya </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Mr. Hong Zhang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Patrick Sanan </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Pedro Ricardo C. Souza </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Pierre Jolivet </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Pierre Seize </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Richard Tran Mills </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Rylee Sundermann </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Sajid Ali </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Satish Balay </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Scott Kruger </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Sebastian Grimberg </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Stefano Zampini </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Thibault Bridelbertomeu </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Toby Isaac </span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">and bug reports/patches/proposed improvements received from</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Adrian Croucher </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">@aldaas</span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Alexandre Halbach </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Anton Glazkov </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Asiri Obeysekara </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">baikadi pranay </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Ben Southworth </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Blaise Bourdin </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Boris Kaus</span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Brad Aagaard </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Carsten Uphoff </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Chen Gang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Daniel Finn </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">"Dobrev, Veselin A." </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Ed Bueler </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Emil Constantinescu </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Eric Chamberland </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Fande Kong </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Frank Bramkamp </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Frederic Vi </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Getnet Betrie </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Greg Vernon </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Hapla Vaclav </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Hong Zhang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Hong Zhang Mr. </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jacob Faibussowitsch </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jed Brown</span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jin Chen </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Jose E. Roman </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Junchao Zhang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Karl Rupp </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Kaustubh Khedkar </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Kort Travis </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Lawrence Mitchell </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Leander Van Speybroeck </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Lisandro Dalcin </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Lukasz Kaczmarczyk </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Mark Adams </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Mark McClure </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Martin Diehl </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Massimiliano Leoni </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Matthew Knepley </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Milan Pelletier </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Moise Rousseau </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Nourgaliev, Robert Nr </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Oliver Zacharias </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Patrick Sanan </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Pierre Jolivet </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Qin Lu </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Qi Tang </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Sajid Ali </span><br style="font-size: 13px;" class=""><a href="mailto:salazardetro1@llnl.gov" style="font-size: 13px;" class="">salazardetro1@llnl.gov</a><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Satish Balay </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Shatrov Oleg </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Stefano Zampini </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">TAY wee-beng </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Victor Eijkhout </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Victoria Hamtiaux </span><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">"Xiaoye S. Li" </span><br style="font-size: 13px;" class=""><a href="mailto:yangym@ihep.ac.cn" style="font-size: 13px;" class="">yangym@ihep.ac.cn</a><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">ZAFATI Eliass </span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">As always, thanks for your support,</span><br style="font-size: 13px;" class=""><br style="font-size: 13px;" class=""><span style="font-size: 13px;" class="">Barry</span></div></body></html>