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Stringy Symmetries and Their High-energy Limit
Jen-Chi Lee
The high-energy limit of stringy symmetries, derived from the decoupling of two types of zero-norm states in the old covariant first quantized (OCFQ) spectrum of open bosonic strin…
Noncommutative Solitons and the W_{1+\infty} Algebras in Quantum Hall Theory
Chuan-Tsung Chan, Jen-Chi Lee
We show that U(\infty) symmetry transformations of the noncommutative field theory in the Moyal space are generated by a combination of two W_{1+\infty} algebras in the Landau prob…
T-dual R-R zero-norm states, D-branes and S-duality of type II string theory
Jen-Chi Lee
We calculate the R-R zero-norm states of type II string spectrum. To fit these states into the right symmetry charge parameters of the gauge transformations of the R-R tensor forms…
Superfield Form of Discrete Gauge States in 2d Supergravity
Tze-Dan Chung, Jen-Chi Lee
A general formula for the discrete states (Neveu-Schwarz sector) in super-Liouville theory is written down in the world-sheet supersymmetric form. We then derive a set o…