Remove all double blank lines from source

Commit-type: petsc-style
/2h

Add support for using -snes_mf_operator with SNESSetPicard()

Applies Newton's method using matrix-free application of the true Jacobian, preconditioned by user provided Picard matrix

This involved

Add support for using -snes_mf_operator with SNESSetPicard()

Applies Newton's method using matrix-free application of the true Jacobian, preconditioned by user provided Picard matrix

This involved adding (*computemffunction)(SNES,Vec,Vec,void*); to be used by the MatCreateSNESMF() operator when it is set and routines to work with the new function.

The implementation requires maintaining a copy of the matrix that is filled by the users routine that computes the matrix at each matrix-vector product. The original matrix is used for constructing the preconditioner and therefor cannot be overwritten.

Also dropped the requirement that the user provide a right hand side function to SNESSetPicard()

Commit-type: feature, example
/spend 8h
Thanks-to: Saransh Saxena <saransh.saxena5571@gmail.com>

show more ...

Merge branch 'jed/promote-examples-tests-tutorials' [petsc/petsc!2610]

* jed/promote-examples-tests-tutorials:
Promote examples/{tests,tutorials}/ to {tests,tutorials}/

Promote examples/{tests,tutorials}/ to {tests,tutorials}/

This shortens paths and improves consistency between test target names
and paths to the source and output files. Most of the work was
compl

Promote examples/{tests,tutorials}/ to {tests,tutorials}/

This shortens paths and improves consistency between test target names
and paths to the source and output files. Most of the work was
completed by this script, followed by mild cleanup of nonconforming
cases.

for makefile in `git ls-files 'src/*makefile'`; do
if rg -q 'DIRS.*\bexamples\b' $makefile; then
base=$(dirname $makefile)
dirs=$(cd $base/examples && ls -d tests tutorials 2>/dev/null | xargs echo)
perl -pi -e "s#^(DIRS.*)\bexamples\b#\1${dirs}#" $makefile
git rm $base/examples/makefile
for t in $dirs; do
git mv $base/examples/$t $base/
perl -pi -e "s#^(LOCDIR[[:space:]]*=).*#\1 $base/$t/#" $base/$t
done
fi
done

git grep -l -E -z 'examples/(tutorials|tests)' | xargs -0 perl -pi -e 's#examples/(tutorials|tests)#\1#g'
git checkout @ \
src/docs/website/documentation/changes/ \
src/benchmarks/results/

show more ...