I'm sorry, cannot find an earlier message where Mr. percival asked if "e'1" is
an expression. He was aswered yes, just as "1" is a (minimal) math
expression.
IMO this is not so easy. [Numerical or symbolical] math expressions can
substitute another expressions as long as sintaxis allows it. But, can e'1
without curly braces substitute a true expression as { e'1 } ?
It would be fine if the sintax diagrams of the LP input language were easily
available. I remember that Pascal lenguage tutorials were completely
based in these diagrams. This would be too much for someone, but always served
as a reference.
--
Francisco Vila Doncel. Badajoz (Spain)
http://www.paconet.org
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