Christopher J. Ash

According to our database, Christopher J. Ash authored at least 23 papers between 1975 and 1997.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

1997

Quasi-Simple Relations in Copies of a Given Recursive Structure.

Christopher J. Ash, Julia F. Knight, Jeffrey B. Remmel

Ann. Pure Appl. Log., 1997

Possible Degrees in Recursive Copies II.

Christopher J. Ash, Julia F. Knight

Ann. Pure Appl. Log., 1997

Permitting, Forcing, and Copying of a Given Recursive Relation.

Christopher J. Ash, Peter Cholak, Julia F. Knight

Ann. Pure Appl. Log., 1997

1996

Recursive Structures and Ershov's Hierarchy.

Christopher J. Ash, Julia F. Knight

Math. Log. Q., 1996

1995

Possible Degrees in Recursive Copies.

Christopher J. Ash, Julia F. Knight

Ann. Pure Appl. Log., 1995

1994

A Completeness Theorem for Certain Classes of Recursive Infinitary Formulas.

Christopher J. Ash, Julia F. Knight

Math. Log. Q., 1994

A Conjecture Concerning the Spectrum of a Sentence.

Christopher J. Ash

Math. Log. Q., 1994

Mixed Systems.

Christopher J. Ash, Julia F. Knight

J. Symb. Log., 1994

On Countable Fractions from an Elementary Class.

Christopher J. Ash

J. Symb. Log., 1994

Ramified Systems.

Christopher J. Ash, Julia F. Knight

Ann. Pure Appl. Log., 1994

1992

Generalizations of Enumeration Reducibility Using Recursive Infinitary Propositional Sentences.

Christopher J. Ash

Ann. Pure Appl. Log., 1992

1991

A Construction for Recursive Linear Orderings.

Christopher J. Ash

J. Symb. Log., 1991

Inevitable Graphs: a Proof of the Type II Conjecture and some Related Decision Procedures.

Christopher J. Ash

Int. J. Algebra Comput., 1991

1990

On the Varieties of Languages Associated with Some Varieties of Finite Monoids with Commuting Idempotents

Christopher J. Ash, Thomas Eric Hall, Jean-Eric Pin

Inf. Comput., May, 1990

Pairs of Recursive Structures.

Christopher J. Ash, Julia F. Knight

Ann. Pure Appl. Log., 1990

Labelling Systems and r.e. Structures.

Christopher J. Ash

Ann. Pure Appl. Log., 1990

1989

Generic Copies of Countable Structures.

Christopher J. Ash, Julia F. Knight, Mark S. Manasse, Theodore A. Slaman

Ann. Pure Appl. Log., 1989

1987

Categoricity in hyperarithmetical degrees.

Christopher J. Ash

Ann. Pure Appl. Log., 1987

1986

Intersections of algebraically closed fields.

Christopher J. Ash, John W. Rosenthal

Ann. Pure Appl. Log., 1986

Stability of recursive structures in arithmetical degrees.

Christopher J. Ash

Ann. Pure Appl. Log., 1986

1984

Decidable Subspaces and Recursively Enumerable Subspaces.

Christopher J. Ash, Rodney G. Downey

J. Symb. Log., 1984

1980

Some Theories Associated with Algebraically Closed Fields.

Christopher J. Ash, John W. Rosenthal

J. Symb. Log., 1980

1975

Sentences with finite models.

Christopher J. Ash

Math. Log. Q., 1975