  Various branches of matrix model partition function can be represented as
intertwined products of universal elementary constituents: Gaussian partition
functions Z_G and Kontsevich tau-functions Z_K. In physical terms, this
decomposition is the matrix-model version of multi-instanton and multi-meron
configurations in Yang-Mills theories. Technically, decomposition formulas are
related to representation theory of algebras of Krichever-Novikov type on
families of spectral curves with additional Seiberg-Witten structure.
Representations of these algebras are encoded in terms of "the global partition
functions". They interpolate between Z_G and Z_K associated with different
singularities on spectral Riemann surfaces. This construction is nothing but
M-theory-like unification of various matrix models with explicit and
representative realization of dualities.
