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Updates to user guide

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sfilippone
2025-05-15 11:53:31 +02:00
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</head><body
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<div class="footnote-text">
<!--l. 363--><p class="noindent" ><span class="footnote-mark"><a
id="fn3x0"><a
id="x7-6020x3"></a> <sup class="textsuperscript">3</sup></a></span><span
class="pplr7t-x-x-80">The subroutine style </span><span
class="cmtt-8">psb</span><span
class="cmtt-8">_precinit </span><span
class="pplr7t-x-x-80">and </span><span
class="cmtt-8">psb</span><span
class="cmtt-8">_precbld </span><span
class="pplr7t-x-x-80">are still supported for backward</span>
<!--l. 253--><p class="noindent" ><span class="footnote-mark"><a
id="fn2x0"><a
id="x7-5002x2.1"></a> <sup class="textsuperscript">2</sup></a></span><span
class="pplr7t-x-x-80">This is the normal situation when the pattern of the sparse matrix is symmetric, which is equivalent to</span>
<span
class="pplr7t-x-x-80">compatibility</span></div>
class="pplr7t-x-x-80">say that the interaction between two variables is reciprocal. If the matrix pattern is non-symmetric we may</span>
<span
class="pplr7t-x-x-80">have one-way interactions, and these could cause a situation in which a boundary point is not a halo point</span>
<span
class="pplr7t-x-x-80">for its neighbour.</span></div>
</body></html>