| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
Many problems in applied sciences, for example the growth of tumors or crystals, are described by nonlinear differential equations with a moving interface. We worked on the analysis of such problems using the notion of viscosity solutions that rely on a order-preserving property of solutions (maximum principle) in these problems. We showed how a small-scale variations in the properties of ice influence the speed of melting using the homogenization approach. We also clarified the relation between sharp interface and diffusive interface models of tumor growth and population dynamics, including situations with a drift field. Finally, we introduced a new notion of viscosity solutions for a model of crystal growth (the crystalline mean curvature flow) in an arbitrary dimension and proved its existence, uniqueness and stability. This opens the possibility for further rigorous study of this model.
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