Re: eqn sqrt and pdf?

[Tadziu Hoffmann]

>     eqn |groff ; ps2pdf14
> 
> the ps rendering is fine but the pdf one got the same issue.

If the Postscript renders fine, your problem may be with the
PS to PDF conversion or with your PDF viewer.  What viewer
are you using?  Does the PDF render okay if you use gv
(or gsview on Windows) to display it?

Check if the output of

  pdffonts <pdffile>

(from the poppler-tools package) contains a line similar to

  name           type     encoding  emb sub uni  object  ID
  ---------------------------------------------------------
  TPTBSA+Symbol  Type 1C  Custom    yes yes no   10      0

(where the first six characters of the font name are random).