Advanced search
Publication Cover
International Journal of Computer Mathematics Volume 12, 1982 - Issue 2
Submit an article Journal homepage
16
Views
14
CrossRef citations to date
0
Altmetric
Original Articles

Expanded subalphabets in the theories of languages and semigroupsFootnote†

Tom Head Department of Mathematical Sciences, University of Alaska, Fairbanks, Alaska, 99701, U.S.A
Pages 113-123 | Received 01 Dec 1981, Published online: 19 Mar 2007

Citations (14)

Keep up to date with the latest research on this topic with citation updates for this article.

Subscribe to citation updates

Read on this site (4)

Wit Foryś. (2006) Retractions and retracts of free topological monoids. International Journal of Computer Mathematics 83:1, pages 21-26.
Read now
James Anderson & Tom Head. (1992) The lattice of semiretracts of a free monoid. International Journal of Computer Mathematics 43:3-4, pages 127-131.
Read now
Wit Foryś & Tom Head. (1990) The poset of retracts of a free monoid. International Journal of Computer Mathematics 37:1-2, pages 45-48.
Read now
Wit Forys. (1990) On the family of retracts of free monoids. International Journal of Computer Mathematics 33:1-2, pages 31-36.
Read now

Articles from other publishers (10)

Wit Foryś & Tomasz Krawczyk. (2006) An algorithmic approach to the problem of a semiretract base. Theoretical Computer Science 369:1-3, pages 314-322.
Crossref
Wit Foryś. (2004) Asymptotic behaviour of bi-infinite words. RAIRO - Theoretical Informatics and Applications 38:1, pages 27-48.
Crossref
Wit Foryś, Tomasz Krawczyk & James A. Anderson. (2003) Semiretracts—a counterexample and some results. Theoretical Computer Science 307:1, pages 117-127.
Crossref
James A. Anderson. (2000) The intersection of retracts of A∗. Theoretical Computer Science 237:1-2, pages 439-445.
Crossref
John Harrison. (1996) On almost cylindrical languages and the decidability of the D0L and PWD0L primitivity problems. Theoretical Computer Science 164:1-2, pages 29-40.
Crossref
J.A. Anderson. (1994) Semiretracts of a free monoid. Theoretical Computer Science 134:1, pages 3-11.
Crossref
Wit Foryś & Tom Head. (1991) Retracts of free monoids are nowhere dense with respect to finite group topologies and p-adic topologies. Semigroup Forum 42:1, pages 117-119.
Crossref
Barbara Lando. (1991) Periodicity and ultimate periodicity of D0L systems. Theoretical Computer Science 82:1, pages 19-33.
Crossref
Tom Head & Barbara Lando. 1990. Sequences. Sequences 244 253 .
G. Rozenberg & A. SalomaaTom Head & Barbara Lando. 1986. The Book of L. The Book of L 147 156 .

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

Related research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.