Hey Guys. Long time lurker here :P I have a question about PhD titles. I am a mathematician. I did my undergraduate degree (BSc) in Mathematics and my postgraduate degree (MSc) in Applied Mathematics, i am now looking at doing a PhD. I found an interesting PhD in next generation data-assimilation methods, and am interested in doing it. Originally I wanted to go into applied differential geometry or something on nonlinear waves, but I cant seem to get a place anywhere. This data-assimilation topic does seem cool, so I am not fussed about that instead. The thing I am curious about, I wanted a PhD in Mathematics, but this PhD would be in "Atmosphere, Oceans and Climate". For some reason, this bugs me. If I were to go for a post-doc or a job in mathematics (where you need a PhD), would I still be able to apply with that PhD? I am a bit worried. I know it is only a title, and I am probably being a little *****, but I always imagined I would do a PhD in Mathematics. Obviously I shouldn't not do a PhD just because of the title, but if it will stop me going into post-doc in Mathematics, I may think about it. Let me know what you think. What would you do if you were in the same situation? Thanks guys. PS, someone told me that lecturers at Universities and researchers tend to have more then one area of interest. Could I research data-assimilation, applied differential geometry, nonlinear waves and quantum mechanics at a later date? (If everything goes to plan that is. I really love the latter three, but the first one (my PhD topic) is brand new to me, but does sound like something I would really like). PPS, I have actually been offered the PhD in "AOC", to start in March. I have 6 applications still not back to me which start in October and is fully funded.