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Not sure which solver package might work 'out of the box'. The issue you encountered in dune-istl seems quite small -
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I'm not an expert but probably the issue with the missing 'str' can be easily fixed. Perhaps someone with more insight can</div>
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give a hint. Of course there might be more difficult issues later in the code.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Kirill Volyanskiy <vol.kirill@gmail.com><br>
<b>Sent:</b> 09 June 2021 12:07<br>
<b>To:</b> Dedner, Andreas <A.S.Dedner@warwick.ac.uk><br>
<b>Subject:</b> Re: [Dune] GMPField use</font>
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<div dir="ltr">Thank you. Could you recommend another solver library compatible with GMPField?<br>
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<div dir="ltr" class="x_gmail_attr">ÓÒ, 9 ÉÀÎ. 2021 Ç. × 12:54, Dedner, Andreas <<a href="mailto:A.S.Dedner@warwick.ac.uk">A.S.Dedner@warwick.ac.uk</a>>:<br>
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<span style="font-family:monospace"><span style="color:rgb(0,0,0); background-color:rgb(255,255,255)">The issue is that the class<br>
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<span style="font-family:monospace"><span style="color:rgb(0,0,0); background-color:rgb(255,255,255)">`mm_numeric_type</span>` in
<span><span style="color:rgb(0,0,0); background-color:rgb(255,255,255)">dune/istl/matrix</span>market.hh</span> is overloaded for a number of types, i.e., int/double etc. There is no overload for GMPField and default implementation of the class doesn't have
a 'str' method.<br>
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<div id="x_gmail-m_-5888913259537441665divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Kirill Volyanskiy <<a href="mailto:vol.kirill@gmail.com" target="_blank">vol.kirill@gmail.com</a>><br>
<b>Sent:</b> 09 June 2021 10:17<br>
<b>To:</b> Dedner, Andreas <<a href="mailto:A.S.Dedner@warwick.ac.uk" target="_blank">A.S.Dedner@warwick.ac.uk</a>><br>
<b>Subject:</b> Re: [Dune] GMPField use</font>
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<div>Hi.</div>
<div>Thank you for your reply.</div>
<div>I am using DUNE 2.7.1, GMP 6.2.1.</div>
<div>I've taken the program from sander-getting-started-with-dune-2-7.pdf and changed some types to GMPField<128> (see in the attached file).</div>
<div>The compilation results are in the errors.txt file.</div>
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<div>Best</div>
<div>Kirill<br>
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<div dir="ltr">ÓÒ, 9 ÉÀÎ. 2021 Ç. × 10:41, Dedner, Andreas <<a href="mailto:A.S.Dedner@warwick.ac.uk" target="_blank">A.S.Dedner@warwick.ac.uk</a>>:<br>
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Hi.</div>
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Happy to help but we need a bit more information about what you are trying to do.</div>
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Where are you using the GMPField, perhaps you could provide a bit of code showing the errors or at least attach the errors you are getting. I don't have any idea why a 'str' function would be needed for a 'Field' class.</div>
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The GMPField has been used in a very specific context so far and I would imaging that using it in for example the istl AMG solver will cause problems with some missing functionality.</div>
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Best</div>
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Andreas<br>
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<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Dune <<a href="mailto:dune-bounces@lists.dune-project.org" target="_blank">dune-bounces@lists.dune-project.org</a>> on behalf of Kirill Volyanskiy <<a href="mailto:vol.kirill@gmail.com" target="_blank">vol.kirill@gmail.com</a>><br>
<b>Sent:</b> 08 June 2021 08:39<br>
<b>To:</b> <a href="mailto:dune@lists.dune-project.org" target="_blank">dune@lists.dune-project.org</a> <<a href="mailto:dune@lists.dune-project.org" target="_blank">dune@lists.dune-project.org</a>><br>
<b>Subject:</b> [Dune] GMPField use</font>
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<div>Hello,</div>
<div>Is there any guide on using the GMPField? I've tried to use it but got many errors in some modules like absence of str() function etc.</div>
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<div>Best regards,</div>
<div>Kirill<br>
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