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I am looking into getting back to school to get a PhD in Mathematics or Computer Science (I hold MA in Math). I am wondering what new areas of research in Math and CS are promising in a sense that they have or will have extensive applications in real life? I understand that this question may sound too general, but I really need a perspective on this as I have been away from academia for quite some years. I worked in investments so one direction could be stochastic equations but this seems to be a beat-up path. I have heard of systems science, self-adaptive systems, which I feel like I could become interested. So I guess my question more specifically is this: what promising extensive real life applications are for Math and CS researchers beyond finance and military areas?

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closed as off-topic by Willie Wong Nov 28 '13 at 12:41

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Big data :-) –  Jean-Claude Arbaut Nov 28 '13 at 10:22
Harmonic analysis is closely related to digital signal procession. –  Potato Nov 28 '13 at 10:40
put this question in academia.stackexchange.com/?as=1 –  Harry Nov 28 '13 at 11:21
This question appears to be off-topic because it is a duplicate of academia.stackexchange.com/questions/14433/phd-in-math-or-cs –  Willie Wong Nov 28 '13 at 12:41
thank you! but since it is considered off-topic i have transferred the question to academia.stackexchange.com –  TooOldToLearn Nov 28 '13 at 13:23