Mathematical Foundations of Computer Science 1990

These are the proceedings of a symposium on the mathematical foundations of theoretical computer science, the 15th of a series held regularly in Czechoslovakia and Poland. Authors are from Europe, USA, Japan and China. It is the major theory conference series of Eastern Europe.

Inhalt
A logical operational semantics of full Prolog.- Syntactic theories.- On kleene algebras and closed semirings.- Interactive computations of optimal solutions.- Restricted branching programs and their computational power.- Dynamic hashing strategies.- One-way functions in complexity theory.- Type inference problems: A survey.- Counting the number of solutions.- Implementation of parallel graph reduction by explicit annotation and program transformation.- Interrogative complexity of ?-languages' recognition.- On the power of uniform families of constant depth threshold circuits.- Separating sets of hyperrectangles.- On preemptive scheduling of periodic, real-time tasks on one processor.- Retractions in comparing prolog semantics (extended abstract).- Using inductive counting to simulate nondeterministic computation.- Some properties of zerotesting bounded one-way multicounter machines.- On fast algorithms for two servers.- Decomposition of semi commutations.- Parallel construction of minimal suffix and factor automata.- Affine automata: A technique to generate complex images.- The complexity of symmetric functions in parity normal forms.- Event structures, causal trees, and refinements.- Query languages which express all PTIME queries for trees and unicyclic graphs.- Comparisons among classes of Y-tree systolic automata.- On checking versus evaluation of multiple queries.- Generalized kolmogorov complexity in relativized separations.- A first-order logic for partial recursive functions.- Speed-up theorem without tape compression.- On possibilities of one-way synchronized and alternating automata.- Unrestricted resolution versus N-resolution.- Quality criteria for partial order semantics of place/transition-nets.- Tree-stack automata.- Specification & verification ofhigher order processes.- The membership problem for context-free chain code picture languages.- Optimal algorithms for dissemination of information in some interconnection networks.- A hierarchy of compositional models of I/O-automata (Extended Abstract).- Minimal nontrivial space complexity of probabilistic one- way turing machines.- On the complexity of genuinely polynomial computation.- Pumping lemmrs for tree languages generated by rewrite systems.- Vector language: Simple description of hard instances.- Separating ?L from L, NL, co-NL and AL (=P) for Oblivious turing machines of linear access time.- The use of graphs of elliptical influence in visual hierarchical clustering.- Characterizing unambiguous augmented pushdown automata by circuits.- Rational ?-transductions.- Splitsortan adaptive sorting algorithm.- Equational calculi for many-sorted algebras with empty carrier sets.- Semi-commutation and deterministic petri nets.- Internal labellings in lambda-calculus.- A sup-preserving completion of ordered partial algebras.- ATIME(n) is closed under Counting.- Investigation of finitary calculi for the temporal logics by means of infinitary calculi.- Typed horn logic (extended abstract).- Results on the glory of the past.- A stronger version of parikh theorem.- The parallel complexity of some constructions in combinatorial group theory (abstract).- Gentzen type axiomatization for PAL.- Distance automata having large finite distance or finite ambiguity.- Bottom-up-heap sort, a new variant of heap sort beating on average quick sort (if n is not very small).- Symmetric functions in AC 0 can be computed in constant depth with very small size.- The k-section of treewidth restricted graphs.- Computing large polynomial powers very fast in parallel.