What is Sergey V. Buldyrev's educational background?
Sergey V. Buldyrev obtained his MS in Mathematical Physics and PhD in Physics and Mathematics from Saint-Petersburg State University, Russia.
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### Instruction:
What is Sergey V. Buldyrev's educational background?

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### Response:
Sergey V. Buldyrev obtained his MS in Mathematical Physics and PhD in Physics and Mathematics from Saint-Petersburg State University, Russia.<|im_end|>