Mathematical Systems Theory, Volume 18

Volume 18, Number 1, June 1985

José L. Balcázar, Uwe Schöning: Bi-Immune Sets for Complexity Classes. 1-10
Bruce E. Litow: On Efficient Deterministic Simulation of Turing Machine Computations Below Logspace. 11-18
Michel Latteux, Jeannine Leguy: On the Usefulness of Bifaithful Rational Cones. 19-32
J. W. Clark, C. K. Ong, Tzyh Jong Tarn, G. M. Huang: Quantum Nondemolition Filters. 33-55
Kevin A. Grasse: Structure of the Boundary of the Attainable Set in Certain Nonlinear Systems. 57-77
Henk Nijmeijer, A. J. van der Schaft: Partial Symmetries for Nonlinear Systems. 79-96

R. Marino, W. M. Boothby, David L. Elliott: Geometric Properties of Linearizable Control Systems. 97-123
G. Sallet: Sur la structure de l'ensemble d'accessibilité de certains systèmes: Application à l'equivalence des systèmes. 125-133
Friedrich Otto, Celia Wrathall: A Note on Thue Systems with a Single Defining Relation. 135-143
Luquan Pan: On Reduced Thue Systems. 145-151
Takumi Kasai, Shigeki Iwata: Gradually Intractable Problems and Nondeterministic Log-Space Lower Bounds. 153-170
Etienne Grandjean: Universal Quantifiers and Time Complexity of Random Access Machines. 171-187

Ker-I Ko: Nonlevelable Sets and Immune Sets in the Accepting Density Hierarchy in NP. 189-205
Andrzej Ehrenfeucht, Grzegorz Rozenberg, R. Verraedt: A Combinatorial Property of EOL Languages. 207-235
John W. Bunce: Stabilizability of Linear Systems Defined over C*-Algebras. 237-250
Vaclav Dolezal, Shiva Shankar: A Local Implicit Function Theorem and Applications to Systems of Differential Equations. 251-256
A. J. van der Schaft: Controlled Invariance for Hamiltonian Systems. 257-291

Christopher I. Byrnes: Editor's Introduction to Euler's "An Essay on Continued Fractions" Translated by B. F. Wyman and M. F. Wyman. 293-294
Leonhard Euler: An Essay on Continued Fractions. 295-328
David F. Delchamps: Global Structure of Families of Multivariable Linear Systems with an Application to Identification. 329-380