Physics

Ricci flow

Nonlinear system

Grassmannian

Integrable system

Pure mathematics

Flag (linear algebra)

Sigma model

Mathematics

Mathematical physics

Manifold (fluid mechanics)

Renormalization group

Algebra over a field

Generalized flag variety

Ricci curvature

Engineering

Lie group

Curvature

Geometry

Sigma

Theoretical physics

Fermion

Quantum mechanics

Mechanical engineering

Physics Reports

This review is dedicated to two-dimensional sigma models with flag manifold target spaces, which are generalizations of the familiar CPn−1 and Grassma…

Flag manifold sigma models