On 2/23/25 05:07, Cesare Padovani wrote:
In the file .lyx I found the lines:
\use_package amsmath 1
\use_package amssymb 0
I changed the second line to:
\use_package amssymb 1
and it worked: the graphic symbol trianglequal appears in the
generated PDF file.
These settings correspond, in the dialog Document Settings | Math
Options, to:
0: amssymb set to "Do not load"
1: amssymb set to "Load automatically"
Finally, I can set the use of the amssymb package through the LyX
interface in "Document Settings | Math Options".
Thanks for your help
P.S. It remains to be understood the difference between "Load
automatically" and "Load always".
As I understand it, "load automatically" means load the package if there
is something in the document that LyX recognizes as requiring the
package (such as the presence of a character that needs amssymb), while
"load always" means just that -- add the package in the preamble without
checking for anything in the document that visibly uses it.
Paul
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