I am a graduate student thinking about some stuff.
If I have an idea for a result but it is not yet complete, is it advisable to mention it to others (especially more experienced people)? Is it possible that he/she will take it, develop it quicker than I do and publish it? How should one behave in these situations?
Is there a rule of thumb about when (and how) to mention your ideas to others in the community?
How often does it happen that a student's idea is hijacked by a more experienced mathematician?