  Connected components of real algebraic varieties invariant under the
$CB_{n}$-Coxeter group are investigated. In particular, we consider their
maximal number and their geometric and topological properties. This provides a
decomposition for the space of $CB_{n}$-algebraic varieties. We construct
$CB_{n}$-polynomials using Young-posets and partitions of integers. Our results
establish bounds on the number of connected components for a given set of
coefficients. It turns out that this number can achieve an upper bound of
$2^{n}+1$ for specific coefficients. We introduce a new method to characterize
the geometry of these real algebraic varieties, using J. Cerf and A. Douady
theory for varieties with angular boundary and the theory of chambers and
galleries. We provide several examples that bring out the essence of these
results.
