Is it a good idea to combine the glossary and the list of notations in a mathematical PhD thesis?
Have your definitions in line rather than in a glossary, it improves the readability of the entire manuscript (whether or not those definitions are actually necessary). People rarely go through glossaries anyway, since it would involve spending twice the amount of time just to switch pages back and forth. Inline definitions, instead, help the reader to flow on without dismissing the attention on the context.