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<TITLE>PCTFS</TITLE>
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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.10.3 v3.10.3 docs/manualpages/PC/PCTFS.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCTFS"><H1>PCTFS</H1></A>
A parallel direct solver intended for problems with very few unknowns (like the coarse grid in multigrid). Performs a Cholesky or LU factorization of a matrix defined by its local matrix vector product. Implemented by Henry M. Tufo III and Paul Fischer originally for Nek5000 and called XXT or XYT
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Only implemented for the MPIAIJ matrices
<P>
Only works on a solver object that lives on all of <A HREF="../Sys/PETSC_COMM_WORLD.html#PETSC_COMM_WORLD">PETSC_COMM_WORLD</A>!
<P>
Only works for real numbers (is not built if <A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> is complex)
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCCreate.html#PCCreate">PCCreate</A>(), <A HREF="../PC/PCSetType.html#PCSetType">PCSetType</A>(), <A HREF="../PC/PCType.html#PCType">PCType</A> (for list of available types), <A HREF="../PC/PC.html#PC">PC</A>
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/pc/impls/tfs/tfs.c.html#PCTFS">src/ksp/pc/impls/tfs/tfs.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/pc/impls/tfs/bitmask.c.html#PCTFS_bm_to_proc">PCTFS_bm_to_proc in src/ksp/pc/impls/tfs/bitmask.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/bitmask.c.html#PCTFS_set_bit_mask">PCTFS_set_bit_mask in src/ksp/pc/impls/tfs/bitmask.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_comm_init">PCTFS_comm_init in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_giop">PCTFS_giop in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_grop">PCTFS_grop in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_grop_hc">PCTFS_grop_hc in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_ssgl_radd">PCTFS_ssgl_radd in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/comm.c.html#PCTFS_giop_hc">PCTFS_giop_hc in src/ksp/pc/impls/tfs/comm.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_init_vec_sz">PCTFS_gs_init_vec_sz in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_init_msg_buf_sz">PCTFS_gs_init_msg_buf_sz in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_local_out">PCTFS_gs_gop_local_out in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_local_plus">PCTFS_gs_gop_local_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_local_in_plus">PCTFS_gs_gop_local_in_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_free">PCTFS_gs_free in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec">PCTFS_gs_gop_vec in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_plus">PCTFS_gs_gop_vec_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_local_plus">PCTFS_gs_gop_vec_local_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_local_in_plus">PCTFS_gs_gop_vec_local_in_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_local_out">PCTFS_gs_gop_vec_local_out in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_pairwise_plus">PCTFS_gs_gop_vec_pairwise_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_vec_tree_plus">PCTFS_gs_gop_vec_tree_plus in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_hc">PCTFS_gs_gop_hc in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_plus_hc">PCTFS_gs_gop_plus_hc in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_pairwise_plus_hc">PCTFS_gs_gop_pairwise_plus_hc in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/gs.c.html#PCTFS_gs_gop_tree_plus_hc">PCTFS_gs_gop_tree_plus_hc in src/ksp/pc/impls/tfs/gs.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_zero">PCTFS_ivec_zero in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_set">PCTFS_ivec_set in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_max">PCTFS_ivec_max in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_min">PCTFS_ivec_min in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_mult">PCTFS_ivec_mult in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_add">PCTFS_ivec_add in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_lxor">PCTFS_ivec_lxor in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_xor">PCTFS_ivec_xor in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_or">PCTFS_ivec_or in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_lor">PCTFS_ivec_lor in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_and">PCTFS_ivec_and in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_land">PCTFS_ivec_land in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_and3">PCTFS_ivec_and3 in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_non_uniform">PCTFS_ivec_non_uniform in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_sort">PCTFS_ivec_sort in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_sort_companion">PCTFS_ivec_sort_companion in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_ivec_sort_companion_hack">PCTFS_ivec_sort_companion_hack in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_SMI_sort">PCTFS_SMI_sort in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_copy">PCTFS_rvec_copy in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_zero">PCTFS_rvec_zero in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_one">PCTFS_rvec_one in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_set">PCTFS_rvec_set in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_scale">PCTFS_rvec_scale in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_add">PCTFS_rvec_add in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_mult">PCTFS_rvec_mult in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_max">PCTFS_rvec_max in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_max_abs">PCTFS_rvec_max_abs in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_min">PCTFS_rvec_min in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_min_abs">PCTFS_rvec_min_abs in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_exists">PCTFS_rvec_exists in src/ksp/pc/impls/tfs/ivec.c</A><BR>
<A HREF="../../../src/ksp/pc/impls/tfs/ivec.c.html#PCTFS_rvec_non_uniform">PCTFS_rvec_non_uniform in src/ksp/pc/impls/tfs/ivec.c</A><BR>
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