git-svn-id: https://geuz.org/svn/gmsh/trunk@15367 59c8cabf-10d6-4a28-b43f-3936b85956c4

Added a 2nd-order IMEX TSRK which works properly. High order IMEX TSRKs show only first order on PDE problems probably due to negative values in the abscissa vector.



git-svn-id: https://geuz.org/svn/gmsh/trunk@15335 59c8cabf-10d6-4a28-b43f-3936b85956c4

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git-svn-id: https://geuz.org/svn/gmsh/trunk@14727 59c8cabf-10d6-4a28-b43f-3936b85956c4

modified gravity waves scripts, now IMEXRK show correct order of accuracy on gravity wave problem.
add a fourth order IMEXRK in dgSolver.cpp, but it does not work properly. 



git-svn-id: https://geuz.org/svn/gmsh/trunk@14714 59c8cabf-10d6-4a28-b43f-3936b85956c4

git-svn-id: https://geuz.org/svn/gmsh/trunk@14695 59c8cabf-10d6-4a28-b43f-3936b85956c4

=gmsh/projects/dg/dgMultirateERK.cpp:1090:11: error: variable ‘iPart’ set but not used [-Werror=unused-but-set-variable]

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git-svn-id: https://geuz.org/svn/gmsh/trunk@14657 59c8cabf-10d6-4a28-b43f-3936b85956c4

git-svn-id: https://geuz.org/svn/gmsh/trunk@14630 59c8cabf-10d6-4a28-b43f-3936b85956c4

git-svn-id: https://geuz.org/svn/gmsh/trunk@14608 59c8cabf-10d6-4a28-b43f-3936b85956c4

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