U(1)xSU(m)_1 Theory and c=m W_{1+\infty} Minimal Models in the Hierarchical Quantum Hall Effect

U(1)_R mediation from the flux compactification in six dimensions

U(1,1)--Invariant Generation of Charges for Einstein--Maxwell--Dilaton--Axion Theory

U(2) instantons and leptons

U(2) projectors and 't Hooft-Polyakov monopoles on a fuzzy sphere

U(2)-chiral symmetries of supersymmetric QED3

U(2,2) gravity on noncommutative space with symplectic structure

U(N) Framed Links, Three-Manifold Invariants, and Topological Strings

U(N) Gauge Model and Partial Breaking of N=2 Supersymmetry

U(N) Gauge Theory and Lattice Strings

U(N) Gauge Theory and Lattice Strings

U(N) Gauged N=2 Supergravity and Partial Breaking of Local N=2 Supersymmetry

U(N) Instantons on N=1/2 superspace -- exact solution & geometry of moduli space

U(n) Spectral Covers from Decomposition

U(N) spinning particles and higher spin equations on complex manifolds

U(n) Vector Bundles on Calabi-Yau Threefolds for String Theory Compactifications

U(N|M) quantum mechanics on Kaehler manifolds

U*(1,1) Noncommutative Gauge Theory As The Foundation of 2T-Physics in Field Theory

U-branes and T^3 fibrations

U-dual fluxes and Generalized Geometry