TABLE OF CONTENTS -- MCSS Volume 6, Number 2 MATH. OF CONTROL, SIGNALS, AND SYSTEMS Arkadii S. Nemirovskii, Several NP-hard problems arising in robust stability analysis, pp. 99-105. J-B. Pomet, R.M. Hirschorn, and W.A. Cebuhar, Dynamic ouput feedback regulation for a class of nonlinear systems, pp. 106-124. Hirosi Sugiyama, A Sampling Theorem with Equally-Spaced Sampling Points on the Negative Time Axis, pp. 125-134. Vincent Blondel and M. Gevers, The simultaneous stabilizability question of three linear systems is undecidable, pp. 135-145. Andrea Baccioti and Paolo Boieri, Linear stabilizability of planar nonlinear systems, pp. 146-165. Y. Kannai and G. Weiss, Approximating signals by fast impulse sampling, pp. 166-179. Richard Vinter and J. Kotsiopoulus, Dynamic programming for free time problems with endpoint constraints, pp. 180-193.