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- Monta Sakamoto, Hiroshi Matsuzoe
- GSI
- 2015

In compactified closed string theories, our naive geometrical interpretation of space-time fails. For instance, the spectrum of closed strings in a box of size R is identical to that of closed strings in a box of size l/R.l} This symmetry comes from the duality between momentum modes and winding modes. This implies that there are two notions of position:… (More)

- M. Kono, N. Takahashi, M. Sakamoto
- 2003

This paper proposes a norm-type discrete algebraic Riccati Equation, which is a generalized version of the well-known standard discrete algebraic Riccati Equation, and has additional norm terms. Under stabilizability and assumption that the additional terms are not too large, the existence of a positive semidefinite solution is guaranteed. Application to… (More)

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