46 citations · 224 across the 37 of their papers we have counts for
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math.AP2019★ 8 cited
Essential self-adjointness of real principal type operators
Shu Nakamura, Kouichi Taira
We study the essential self-adjointness for real principal type differential operators. Unlike the elliptic case, we need geometric conditions even for operators on the Euclidean s…
math-ph2019★ 3 cited
On a continuum limit of discrete Schrödinger operators on square lattice
Shu Nakamura, Yukihide Tadano
The norm resolvent convergence of discrete Schrödinger operators to a continuum Schrödinger operator in the continuum limit is proved under relatively weak assumptions. This result…