[cottonseed]

Mathematician here. What do you want this for? Even if you had them, you probably wouldn't understand the definitions anyway.

As others say, there is no standard, and conventions vary by subfield, publication, author and over time. This is esp. true at the research level, where the mathematical content is still being worked out. Subfields have certain conventions, and well-written books and papers will normally introduction notation or include an index of notation, esp. if the notation is novel or they different from the usual conventions. You could start compiling something like this by going through the standard undergrad and grad textbooks for each subject.