<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div> Perhaps this is what you are looking for <a href="https://urldefense.us/v3/__https://petsc.org/release/manualpages/Mat/MATNEST/*matnest__;Iw!!G_uCfscf7eWS!e9L1JRLW7O-w_LDeaQomJxREvfqcm0FrZtlpjeE46ux3HjMJELyJmp9jx4uTJkK7WyQc57DtJFcC3nFe6jEJpOU$">https://petsc.org/release/manualpages/Mat/MATNEST/#matnest</a> ?<br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Oct 24, 2024, at 8:48 PM, Diego Magela Lemos via petsc-users <petsc-users@mcs.anl.gov> wrote:</div><br class="Apple-interchange-newline"><div><div dir="auto">Is there something similar to SciPy sparse block_array (<a href="https://urldefense.us/v3/__https://docs.scipy.org/doc/scipy/reference/generated/scipy.sparse.block_array.html*scipy.sparse.block_array__;Iw!!G_uCfscf7eWS!YANe4IC4s7Ki7CYmRbt0miQwrrFq7e-6_btfizr9d4vir0dzWIncCQBkH3Cbr94Y_jxGNSAhJh59aSOHAHRESglgg7A$">https://docs.scipy.org/doc/scipy/reference/generated/scipy.sparse.block_array.html#scipy.sparse.block_array</a>) or bmat (<a href="https://urldefense.us/v3/__https://docs.scipy.org/doc/scipy/reference/generated/scipy.sparse.bmat.html__;!!G_uCfscf7eWS!YANe4IC4s7Ki7CYmRbt0miQwrrFq7e-6_btfizr9d4vir0dzWIncCQBkH3Cbr94Y_jxGNSAhJh59aSOHAHREvOCba0s$">https://docs.scipy.org/doc/scipy/reference/generated/scipy.sparse.bmat.html</a>) in PETSc? </div>
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