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<p class="MsoNormal">Hi<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I am working on an implementation where it would be very useful to have a matrix data structure that could contain matrices of varying size. I suppose that this is the intention with the data structure VariableBCRSMatrix
(which is mentioned <a href="https://dune-project.org/doxygen/2.4.1/group__ISTL__SPMV.html">
here</a>). The documentation page says that this data structure is not yet implemented (under “Detailed Description”).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it something that is planned to be implemented at some point or is it currently unscheduled to do so?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If it is not scheduled, is it a task that requires intimate knowledge of the data structures or would it be feasible for me to try to make a preliminary and maybe limited version myself?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’ve looked at the files dune/istl/vbvector.hh and dune/istl/bcrsmatrix.hh. vbvector.hh looks somewhat reasonable in complexity (a lot of smaller functions) while bcrsmatrix.hh seems more challenging to me.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Tobias Ritschel<o:p></o:p></span></p>
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