Anita, are you asking about a transcription using Nemeth Code within a UEB context? If so, then any mathematical symbols must be within Nemeth Code switch indicators, and a dot locator (which is a UEB tool) would not be appropriate or necessary.
If you're asking about a transcription using ONLY UEB (and no Nemeth Code), then you still probably do not need any dot locator symbols. Though, it's possible you could need a dot locator for use in front of "a braille symbol which has only lower dots and which is isolated from other text" – see Rules of UEB section 3.14.1. (The dot locator for mention is designed for symbols lists, transcriber's notes and publications about braille; see Rules of UEB section 3.13.1.)
Thank you for the question!
–Kyle
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This reply was modified 6 years, 4 months ago by kdejute. Reason: correction: "dot locator FOR MENTION" is designed for symbols lists, transcriber's notes and publications about braille
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This reply was modified 6 years, 4 months ago by Chris Clemens.