February 2018 - firedrake - imperial.ac.uk

Needing guidance
by Amireh Mousavi 22 Feb '18

22 Feb '18

To whom it may concern I want to install Firedrake on windows system. Can you please give me some advice and guidance in this direction. I should say that I have Cygwin on my system. Thank you in advance. All the best, Amireh Mousavi

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FEniCS'18 Conference 21-23 March, University of Oxford
by Patrick Farrell 15 Feb '18

15 Feb '18

Dear Firedrake community, Due to several requests, we have decided to extend the abstract submission deadline for FEniCS'18 by a week. Abstract submission will close on 21 February. For further details please see https://fenicsproject.org/fenics18/ . We are very much looking forward to seeing you in Oxford! Best regards, Patrick

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.at() PETSC error
by Floriane Gidel [RPG] 08 Feb '18

08 Feb '18

Dear all, I try to extract the values of a function h, at some specific positions with the function .at() . I define a coarse mesh with Nx_fine = int(Lx/0.4) + 1 Ny_fine = int(Ly/0.4) + 1 coarse_mesh = RectangleMesh(Nx_coarse,Ny_coarse,Lx,Ly,quadrilateral=True) coarse_V = FunctionSpace(coarse_mesh, "CG", 1) coarse_h = Function(coarse_V, name="h") V_vec_c = VectorFunctionSpace(coarse_mesh, "CG", 1) coarse_points = Function(V_vec_c , name="coarse_points") coarse_points.interpolate(SpatialCoordinate(coarse_mesh)) Then I define a finer mesh with Nx_fine = int(Lx/0.1) + 1 Ny_fine = int(Ly/0.1) + 1 fine_mesh = RectangleMesh(Nx_fine,Ny_fine,Lx,Ly,quadrilateral=True) fine_V = FunctionSpace(fine_mesh, "CG", 1) fine_h = Function(fine_V, name="h") Then I load an h5 function into fine_h (defined on the same function space) with dumb_file_fine = DumbCheckpoint(save_path+"fine/h_0", mode=FILE_READ) dumb_file_fine.load(fine_h) dumb_file_fine.close() But then, when I try to extract the values of fine_h at the coordinates of coarse_mesh with coarse_data_fine = fine_h.at(coarse_points.dat.data_ro) I get this error: [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind [0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors [0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and run [0]PETSC ERROR: to get more information on the crash. -------------------------------------------------------------------------- MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD with errorcode 59. NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. -------------------------------------------------------------------------- Is someone familiar with this error ? Thanks, Floriane

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FEniCS'18 Conference 21-23 March, University of Oxford
by Patrick Farrell 06 Feb '18

06 Feb '18

Dear Firedrake community, You are warmly invited to the FEniCS 2018 meeting, on 21-23 March, at the University of Oxford. Registration and abstract submission are now open. Abstract submission closes on 14 February. For further details please see https://fenicsproject.org/fenics18/ . We are very much looking forward to seeing you in Oxford! Best regards, Patrick

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PDESoft 2018 submission deadline
by Lawrence Mitchell 05 Feb '18

05 Feb '18

Dear Firedrakers, if you are interested in the development of PDE software more broadly than just Firedrake itself (!), you may be interested in PDESoft in Norway this summer (the week before the Firedrake workshop). The abstract submission deadline has been extended until 19th February. A brief one-paragraph description: The PDE Software Frameworks 2018 conference takes place May 28-30 in Bergen, Norway. This conference provides a forum for the developers and users of software solving the diverse stages of the numerical PDE process, and for discussing future directions of research and development. http://www.iris.no/pdesoft18/pde-software-homepage Cheers, Lawrence

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firedrake install failing
by William Booker [RPG] 05 Feb '18

05 Feb '18

Dear Firedrakers, Attached the log file. How do I fix this? Regards Will

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Firedrake user and developer workshop: 7-8 June 2018
by Lawrence Mitchell 01 Feb '18

01 Feb '18

Dear all, the second Firedrake users and developers meeting will be held this summer at Imperial College on the 7th and 8th June. It will once again provide an opportunity for users and developers of Firedrake to get together, exchange ideas, application challenges, and future development directions. The workshop will start with a half-day introductory tutorial for interested new users. The call for contributions, and registration is now open. Please see https://www.firedrakeproject.org/firedrake_18.html for more details. Important dates: - Early registration and abstract closes 10th April - Registration closes 25th May (but book early, it's cheaper!) - Workshop: 7-8th June We hope to see many of you in June! Cheers, Lawrence (and the Firedrake team)

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