  The skew Schur functions admit many determinantal expressions. Chief among
them are the (dual) Jacobi-Trudi formula and the Lascoux-Pragacz formula, which
is a skew analogue of the Giambelli identity. Comparatively, the skew
characters of the symplectic and orthogonal groups, also known as the skew
symplectic and orthogonal Schur functions, have received less attention in this
direction. We establish analogues of the dual Jacobi-Trudi and Lascoux-Pragacz
formulae for these characters. Our approach is entirely combinatorial, being
based on lattice path descriptions of the tableaux models of Koike and Terada.
Ordinary Jacobi-Trudi formulae are then derived in an algebraic manner from
their duals.
