Andries P. J. van der Walt - researchr alias

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Viewing Publication 1 - 14 from 14

2013

Necessary conditions for subclasses of random context languagesSigrid Ewert, Andries P. J. van der Walt. TCS, 475:66-72, 2013. [doi]

2008

Bag Context Tree GrammarsFrank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt. FUIN, 86(4):459-480, 2008. [doi]

2006

Bag Context Tree GrammarsFrank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt. dlt 2006: 226-237 [doi]

2005

Random context tree grammars and tree transducersFrank Drewes, Christine du Toit, Sigrid Ewert, Johanna Högberg, Brink van der Merwe, Andries P. J. van der Walt. saj, 34:11-25, 2005.

2003

The Power and Limitations of Random ContextSigrid Ewert, Andries P. J. van der Walt. BIRTHDAY 2003: 33-44

A property of random context picture grammarsAndries P. J. van der Walt, Sigrid Ewert. TCS, 1-3(301):313-320, 2003. [doi]

2002

A pumping lemma for random permitting context languagesSigrid Ewert, Andries P. J. van der Walt. TCS, 270(1-2):959-967, 2002. [doi]

2000

A shrinking lemma for random forbidding context languagesAndries P. J. van der Walt, Sigrid Ewert. TCS, 237(1-2):149-158, 2000. [doi]

1999

Shrink Indecomposable FractalsSigrid Ewert, Andries P. J. van der Walt. jucs, 5(9):521-531, 1999. [doi]

Generating Pictures Using Random Permitting ContextSigrid Ewert, Andries P. J. van der Walt. ijprai, 13(3):339-355, 1999.

A Hierarchy Result for Random Forbidding Context Picture GrammarsSigrid Ewert, Andries P. J. van der Walt. ijprai, 13(7):997-1008, 1999.

1998

Generating Pictures Using Random Forbidding ContextSigrid Ewert, Andries P. J. van der Walt. ijprai, 12(7):939-950, 1998.

1976

Locally Linear Families of LanguagesAndries P. J. van der Walt. iandc, 32(1):27-32, September 1976.

1971

Random Context LanguagesAndries P. J. van der Walt. ifip 1971: 66-68

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