We study the zeros in the complex plane of the partition function for the
Ising model coupled to 2d quantum gravity for complex magnetic field and for
complex temperature. We compute the zeros by using the exact solution coming
from a two matrix model and by Monte Carlo simulations of Ising spins on
dynamical triangulations. We present evidence that the zeros form simple
one-dimensional patterns in the complex plane, and that the critical behaviour
of the system is governed by the scaling of the distribution of singularities
near the critical point.Comment: 3 pages, 8 figures, latex2e, uses espcrc2.sty. Contribution to
Lattice '97, Edinburgh, July 1997, to appear on Nucl. Phys. B (Proc. Suppl.
