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<div style="font-family: Times New Roman; color: #000000; font-size: 16px"><font size="3">Hello,</font>
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<p style="margin-bottom:0cm"><font size="3">I am using chaste software to solve a system including 2 linear systems with same coefficient matrix. Therefore, I want to use multiple right hand sides solver in PETSc or MUMPS. I have to solve the first linear system
and use its solution to construct left hand side of the second system. </font></p>
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<p style="margin-bottom:0cm"><font size="3">I looked for PETSc and MUMPS documentations to figure out how to use multiple right hand sides solver. However, I could not find any clear instruction or example. Could you please help me on this?</font></p>
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<p style="margin-bottom:0cm"><font size="3">I use<br>
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<p style="margin-bottom:0cm"><font size="3">mpirun -np 64 $CHASTE_LOCATION/projects/SDIRK/build/intel/"$fileName"Runner -ksp_type preonly -ksp_initial_guess_nonzero 0 -pc_type lu -pc_factor_mat_solver_package mumps<br>
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to run my code. Should I add another option to be able to use multiple right hand sides solver with 2 right hand sides? Or should I make change in my chaste code or PETSc codes?</font></p>
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<p style="margin-bottom:0cm"><font size="3">Bests,</font></p>
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<p style="margin-bottom:0cm"><font size="3">Saeed</font></p>
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