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    Sorry for the imprecisely description.
    <p>I have an unstructured grid (DMPLEX) with triangle mesh.</p>
    <p>cell number (2 dim)={0};    line number (1 dim)={1, 2, 3};   
      node number (0 dim)={4, 5, 6}</p>
    <p>Thank you,</p>
    <p>Barry<br>
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    <div class="moz-cite-prefix">On 11/30/18 8:33 PM, Stefano Zampini
      wrote:<br>
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cite="mid:CAGPUisiu4oChg8bTzMUuVrJsVBGCSVUJ84SZ66QhoW_2VhkHZg@mail.gmail.com">
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            <div dir="ltr">Il giorno Ven 30 Nov 2018, 15:05 Tsung-Hsing
              Chen via petsc-users <<a
                href="mailto:petsc-users@mcs.anl.gov"
                moz-do-not-send="true">petsc-users@mcs.anl.gov</a>>
              ha scritto:<br>
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              <div dir="ltr">Hi,
                <div>Is there any function that can get cell number from
                  the given node number exist already?</div>
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        <div dir="auto">Cell number of what? DMPLEX? And what is "node
          number"?</div>
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                <div>Thank you,</div>
                <div>Barry</div>
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