Christopher J. Ash - researchr alias

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Viewing Publication 1 - 23 from 23

1997

Quasi-Simple Relations in Copies of a Given Recursive StructureChristopher J. Ash, Julia F. Knight, Jeffrey B. Remmel. APAL, 86(3):203-218, 1997.

Permitting, Forcing, and Copying of a Given Recursive RelationChristopher J. Ash, Peter Cholak, Julia F. Knight. APAL, 86(3):219-236, 1997.

Possible Degrees in Recursive Copies IIChristopher J. Ash, Julia F. Knight. APAL, 87(2):151-165, 1997.

1996

Recursive Structures and Ershov s HierarchyChristopher J. Ash, Julia F. Knight. mlq, 42:461-468, 1996.

1995

Possible Degrees in Recursive CopiesChristopher J. Ash, Julia F. Knight. APAL, 75(3):215-221, 1995.

1994

A Conjecture Concerning the Spectrum of a SentenceChristopher J. Ash. mlq, 40:393-397, 1994.

On Countable Fractions from an Elementary ClassChristopher J. Ash. JSYML, 59(4):1410-1413, 1994.

Ramified SystemsChristopher J. Ash, Julia F. Knight. APAL, 70(3):205-221, 1994.

A Completeness Theorem for Certain Classes of Recursive Infinitary FormulasChristopher J. Ash, Julia F. Knight. mlq, 40:173-181, 1994.

Mixed SystemsChristopher J. Ash, Julia F. Knight. JSYML, 59(4):1383-1399, 1994.

1992

Generalizations of Enumeration Reducibility Using Recursive Infinitary Propositional SentencesChristopher J. Ash. APAL, 58(3):173-184, 1992.

1991

A Construction for Recursive Linear OrderingsChristopher J. Ash. JSYML, 56(2):673-683, 1991.

Inevitable Graphs: a Proof of the Type II Conjecture and some Related Decision ProceduresChristopher J. Ash. ijac, 1(1):127-146, 1991. [doi]

1990

Labelling Systems and r.e. StructuresChristopher J. Ash. APAL, 47(2):99-119, 1990.

On the Varieties of Languages Associated with Some Varieties of Finite Monoids with Commuting IdempotentsChristopher J. Ash, T. E. Hall, Jean-Eric Pin. iandc, 86(1):32-42, May 1990.

Pairs of Recursive StructuresChristopher J. Ash, Julia F. Knight. APAL, 46(3):211-234, 1990.

1989

Generic Copies of Countable StructuresChristopher J. Ash, Julia F. Knight, Mark S. Manasse, Theodore A. Slaman. APAL, 42(3):195-205, 1989.

1987

Categoricity in hyperarithmetical degreesChristopher J. Ash. APAL, 34(1):1-14, 1987. [doi]

1986

Intersections of algebraically closed fieldsChristopher J. Ash, John W. Rosenthal. APAL, 30(2):103-119, 1986. [doi]

Stability of recursive structures in arithmetical degreesChristopher J. Ash. APAL, 32:113-135, 1986. [doi]

1984

Decidable Subspaces and Recursively Enumerable SubspacesChristopher J. Ash, Rodney G. Downey. JSYML, 49(4):1137-1145, 1984.

1980

Some Theories Associated with Algebraically Closed FieldsChristopher J. Ash, John W. Rosenthal. JSYML, 45(2):359-362, 1980.

1975

Sentences with finite modelsChristopher J. Ash. mlq, 21(1):401-404, 1975. [doi]

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