Lambda calculus characterizations of poly-time
Fundamenta Informaticae - Special issue: lambda calculus and type theory
A new recursion-theoretic characterization of the polytime functions
Computational Complexity
Function-algebraic characterizations of log and polylog parallel time
Computational Complexity
A characterization of alternating log time by ramified recurrence
Theoretical Computer Science - Trees in algebra and programming
The strength of non-size increasing computation
POPL '02 Proceedings of the 29th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Linear Ramified Higher Type Recursion and Parallel Complexity
PTCS '01 Proceedings of the International Seminar on Proof Theory in Computer Science
Ramified Recurrence and Computational Complexity II: Substitution and Poly-Space
CSL '94 Selected Papers from the 8th International Workshop on Computer Science Logic
Linear Types and Non Size-Increasing Polynomial Time Computation
LICS '99 Proceedings of the 14th Annual IEEE Symposium on Logic in Computer Science
A Characterization of NC by Tree Recurrence
FOCS '98 Proceedings of the 39th Annual Symposium on Foundations of Computer Science
Separating NC along the δ axis
Theoretical Computer Science - Implicit computational complexity
CSL '08 Proceedings of the 22nd international workshop on Computer Science Logic
A characterization of NCk by first order functional programs
TAMC'08 Proceedings of the 5th international conference on Theory and applications of models of computation
A characterization of alternating log time by first order functional programs
LPAR'06 Proceedings of the 13th international conference on Logic for Programming, Artificial Intelligence, and Reasoning
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We define a hierarchy of term systems Tk by means of restrictions of the recursion schema. We essentially use a pointer technique together with tiering. We prove Tk⊆NCk⊆Tk+1, for k ≥2. Special attention is put on the description of T2 and T3 and on the proof of T2⊆NC2⊆T3. Such a hierarchy yields a characterization of NC.