Do I use a title in the mention "joint with [...]" when mentioning my advisor or a coworker? I'm making presentation slides, which will be on the work of my Ph.D. advisor (Dr. X, full professor), a postdoc. (Dr. Y, the job title is visiting assistant professor) and myself. I'm trying to find a way to most accurately/politely address them.
Should I address them using the same generic title, such as

&quot;Joint work with Professors X and Y&quot;
&quot;Joint work with Dr. X and Dr. Y&quot;

or should I use different titles?
Thanks
In my experience (math), I have never seen a title used on such an occasion. It's always "joint with Jane Doe and John Doe", i.e. the full name without any title. Even if it's a student jointly working with a professor.

Think about it: in a bibliography you never use any title. The goal of the mention "joint with" is the same as in a bibliography: give credit where credit is due, and let people look up who did the work. A title is unnecessary for that.