default search action
Google
Google Scholar
Semantic Scholar
Internet Archive Scholar
CiteSeerX
ORCIDAndries P. J. van der Walt
Person information
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
Journal Articles
- 2013
[j11]Sigrid Ewert
, Andries P. J. van der Walt:
Necessary conditions for subclasses of random context languages. Theor. Comput. Sci. 475: 66-72 (2013)- 2008
- [j10]Frank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt:
Bag Context Tree Grammars. Fundam. Informaticae 86(4): 459-480 (2008) - 2005
- [j9]Frank Drewes, Christine du Toit, Sigrid Ewert, Johanna Högberg, Brink van der Merwe, Andries P. J. van der Walt:
Random context tree grammars and tree transducers. South Afr. Comput. J. 34: 11-25 (2005) - 2003
- [j8]Andries P. J. van der Walt, Sigrid Ewert:
A property of random context picture grammars. Theor. Comput. Sci. 301(1-3): 313-320 (2003) - 2002
- [j7]Sigrid Ewert, Andries P. J. van der Walt:
A pumping lemma for random permitting context languages. Theor. Comput. Sci. 270(1-2): 959-967 (2002) - 2000
- [j6]Andries P. J. van der Walt, Sigrid Ewert:
A shrinking lemma for random forbidding context languages. Theor. Comput. Sci. 237(1-2): 149-158 (2000) - 1999
- [j5]Sigrid Ewert, Andries P. J. van der Walt:
Generating Pictures Using Random Permitting Context. Int. J. Pattern Recognit. Artif. Intell. 13(3): 339-355 (1999) - [j4]Sigrid Ewert, Andries P. J. van der Walt:
A Hierarchy Result for Random Forbidding Context Picture Grammars. Int. J. Pattern Recognit. Artif. Intell. 13(7): 997-1008 (1999) - [j3]Sigrid Ewert, Andries P. J. van der Walt:
Shrink Indecomposable Fractals. J. Univers. Comput. Sci. 5(9): 521-531 (1999) - 1998
- [j2]Sigrid Ewert, Andries P. J. van der Walt:
Generating Pictures Using Random Forbidding Context. Int. J. Pattern Recognit. Artif. Intell. 12(7): 939-950 (1998) - 1976
- [j1]Andries P. J. van der Walt:
Locally Linear Families of Languages. Inf. Control. 32(1): 27-32 (1976)
Conference and Workshop Papers
- 2006
- [c3]Frank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt:
Bag Context Tree Grammars. Developments in Language Theory 2006: 226-237 - 2003
- [c2]Sigrid Ewert, Andries P. J. van der Walt:
The Power and Limitations of Random Context. Grammars and Automata for String Processing 2003: 33-44 - 1971
- [c1]Andries P. J. van der Walt:
Random Context Languages. IFIP Congress (1) 1971: 66-68
Coauthor Index
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.
Unpaywalled article links
Add open access links from 
to the list of external document links (if available).
Privacy notice: By enabling the option above, your browser will contact the API of unpaywall.org to load hyperlinks to open access articles. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Unpaywall privacy policy.
Archived links via Wayback Machine
For web page which are no longer available, try to retrieve content from the 
of the Internet Archive (if available).
Privacy notice: By enabling the option above, your browser will contact the API of archive.org to check for archived content of web pages that are no longer available. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Internet Archive privacy policy.
Reference lists
Add a list of references from 
, 
, and 
to record detail pages.
load references from crossref.org and opencitations.net
Privacy notice: By enabling the option above, your browser will contact the APIs of crossref.org, opencitations.net, and semanticscholar.org to load article reference information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Crossref privacy policy and the OpenCitations privacy policy, as well as the AI2 Privacy Policy covering Semantic Scholar.
Citation data
Add a list of citing articles from and to record detail pages.
load citations from opencitations.net
Privacy notice: By enabling the option above, your browser will contact the API of opencitations.net and semanticscholar.org to load citation information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the OpenCitations privacy policy as well as the AI2 Privacy Policy covering Semantic Scholar.
OpenAlex data
Load additional information about publications from 
.
Privacy notice: By enabling the option above, your browser will contact the API of openalex.org to load additional information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the information given by OpenAlex.
last updated on 2024-04-24 23:01 CEST by the dblp team
all metadata released as open data under CC0 1.0 license
see also: Terms of Use | Privacy Policy | Imprint
dblp was originally created in 1993 at:
since 2018, dblp has been operated and maintained by:
the dblp computer science bibliography is funded and supported by:
