• 대한수학회지
• /
• 제42권6호
• /
• pp.1231-1249
• /
• 2005

By employing Chebotarev and Fagnola's sufficient conditions for conservativity of minimal quantum dynamical semigroups [7, 8], we construct the conservative minimal quantum dynamical semigroups generated by noncommutative elliptic operators in the sense of [2]. We apply our results to concrete examples.

• 한국수학교육학회지시리즈A:수학교육
• /
• 제15권1호
• /
• pp.33-38
• /
• 1976

본 논문에서는 Banach 공간에서의 비선형 축소작용소의 반군에 대하여 조사하고 비선형 반군에서의 생성작용소의 생성을 논하였다.

• 한국전산유체공학회지
• /
• 제9권3호
• /
• pp.26-38
• /
• 2004

A study has been made for the investigation of the robustness and convergence of various implicit operators of the LU-SGS scheme using linear stability analysis. It is shown that the behavior of the implicit operator is not determined by its own characteristics, but is determined relatively depending on the dissipative property of the explicit operator. It is also shown that, as the dissipation level of the implicit operator increases, the robustness of the scheme increases, but the convergence rate can be deteriorated due to the excessive dissipation. The numerical results demonstrate that the dissipation level of the impliict operator needs to be higher than that of the explicit operator for computing stiff problems.