Covariant Hamiltonian formalism for the calculus of variations with several variables

Covariant Hamiltonian formalism for the calculus of variations with several variables: Lepage--Dedecker versus de Donder--Weyl

Covariant observables on a nonunimodular group

Covariant Poisson Brackets in Geometric Field Theory

Covariant Poisson equation with compact Lie algebras

Covariant quantum instruments

Covariant SPDEs and Quantum Field Structures

Covariant star product on symplectic and Poisson spacetime manifolds

Covariantizing Classical Field Theories

Covariants,joint invariants and the problem of equivalence in the invariant theory of Killing tensors defined in pseudo-Riemannian spaces of constant curvature

Coverings, correspondences, and noncommutative geometry

Coxeter discriminants and logarithmic Frobenius structures

CPT groups for spinor field in de Sitter space

CPT groups of higher spin fields

Creating desired potentials by embedding small inhomogeneities

Creating materials with a desired refraction coefficient

Creating Wave-Focusing Materials

Creation and Annihilation Operators for Orthogonal Polynomials of Continuous and Discrete Variables

Cremmer-Gervais Quantum Lie Algebra

Criterion for polynomial solutions to a class of linear differential equation of second order