Issue 105848 - Change formula parser to accept single operators as own expression
Summary: Change formula parser to accept single operators as own expression
Status: CONFIRMED
Alias: None
Product: Math
Classification: Application
Component: code (show other issues)
Version: OOO310m19
Hardware: PC All
: P3 Trivial (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
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Reported: 2009-10-13 09:30 UTC by graemefoster
Modified: 2013-02-07 22:38 UTC (History)
1 user (show)

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Issue Type: ENHANCEMENT
Latest Confirmation in: ---
Developer Difficulty: ---

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Description graemefoster 2009-10-13 09:30:50 UTC 
For a limit to exist the left and right limits need to exist and have the same
value. The formula to express this would be:

lim csub{x %tendto 1 ^{-}}f(x)

However the minus in brackets is treated as an operator and so it expects a
value to follow.

This may require a significant change to the parser to properly implement but
adding a special character to the catalog may fix this:


lim csub{x %tendto 1 ^{%leftbound}}f(x)

Thus adding %leftbound (a negative sign) and %rightbound (a positive sign) may
be sufficient.
Comment 1 michael.ruess 2009-10-13 12:22:27 UTC 
As long as this is still not implemented, use an empty expression as workaround:
lim csub{x %tendto 1 ^{-{}}}f(x)

This is related to issue 87337.