Journal of Algebraic Combinatorics An International Journal Editors-in-Chief (+deputy) C.D. Godsil Dept. of Combinatorics & Optimization University of Waterloo, Ontario, Canada I.P. Goulden Dept. of Combinatorics & Optimization University of Waterloo, Ontario, Canada D.M. Jackson Dept. of Combinatorics & Optimization University of Waterloo, Ontario, Canada AIMS AND SCOPE The Journal of Algebraic Combinatorics provides a single forum for papers on algebraic combinatorics which, at present, are distributed throughout a number of journals. Within the last decade or so, algebraic combinatorics has evolved into a mature, established and identifiable area of mathematics. Research contributions in the field are increasingly seen to have substantial links with other areas of mathematics. The journal publishes papers in which combinatorics and algebra interact in a significant and interesting fashion. This interaction might occur through the study of combinatorial structures using algebraic methods, or the application of combinatorial methods to algebraic problems. The combinatorics might be enumerative, or involve matriods, posets, polytopes, codes, designs, or finite geometries. The algebra could be group theory, representation theory, lattice theory or commutative algebra, to mention just a few possibilities. Papers on applications are welcome. The Journal of Algebraic Combinatorics is published quarterly, with distribution to librarians, researchers in combinatorics, and mathematical and computer scientists with a strong interest in combinatorial structure. The journal maintains strict refereeing procedures through its editorial policies in order to publish papers of only the highest quality. INSTRUCTIONS FOR AUTHORS Authors are encouraged to submit high quality, original work that has neither appeared in, nor is under consideration by, other journals. PROCESS FOR SUBMISSION 1. Authors should submit five hard copies of their final manuscript to: Mrs. Karen S. Cullen JOURNAL OF ALGEBRAIC COMBINATORICS Editorial Office Kluwer Academic Publishers Tel.: 617-871-6300 101 Philip Drive FAX: 617-871-6528 Norwell, MA 02061 E-mail: Karen@world.std.com For prompt attention, all correspondence can be directed to this address. 2. Enclose with each manuscript, on a separate page, from three to five key words. 3. Enclose originals for the illustrations, in the style described below, for one copy of the manuscript. Photocopies of the figures may accompany the remaining copies of the manuscript. Alternatively, original illustrations may be submitted after the paper has been accepted. 4. Enclose a separate page giving the preferred address of the contact author for correspondence and return of proofs. Please include a telephone number, fax number and e-mail address, if available. 5. The refereeing is done by anonymous reviewers. STYLE FOR MANUSCRIPT 1. Typeset, double space in English; use one side of sheet only (laser printed, typewritten and good quality duplication acceptable). 2. Use an informative title for the paper and include an abstract of 100 to 250 words at the head of the manuscript. The abstract should be a carefully worded description of the problem addressed, the key ideas introduced, and the results. Abstracts will be printed with the article. 3. Provide a separate double-spaced sheet listing all footnotes, beginning with "Affiliation of author" and continuing with numbered footnotes. Acknowledgement of financial support may be given if appropriate. 4. References should appear in a separate bibliography at the end of the paper double spaced with items referred to by numerals and put in alphabetical order. References in the text should be denoted by numbers in square brackets, e.g. [12]. References should be complete, in the following style: Style for papers: Author(s) initials followed by last name for each author, paper title, publication name, volume (year), inclusive page numbers. Style for books: Author(s), title, publisher,location, year, chapter or page numbers (if desired). Examples as follows: (Book) I.G. Macdonald, Symmetric Functions and Hall Polynomials, Oxford University Press, Oxford, 1979.. (Journal Article) A.O. Morris, "The spin representation of the symmetric group," Canadian Journal of Mathematics 17(1965), 543- 549. (Conference Proceedings) A. A. Ivanov, "Geometric presentations of groups with an application to the Monster," Proc. ICM-90, Kyoto, Japan, 1990, vol. 2, pp.385-395, Springer-Verlag, 1991. 5. Type or mark mathematical copy exactly as they should appear in print. Use ?? as an end of proof symbol. Journal style for letter symbols is as follows: variables, italic type (indicated by underline); constants, roman text type; matrices and vectors, boldface type (indicated by wavy underline). In word-processor manuscripts, use appropriate typeface. It will be assumed that letters in displayed equations are to be set in italic type unless you mark them otherwise. All letter symbols in text discussion must be marked if they should be italic or boldface. Indicate best breaks for equations in case they will not fit on one line. STYLE FOR ILLUSTRATIONS 1. Originals for illustrations should be sharp, noise-free, and of good contrast. We regret that we cannot provide drafting or art service. 2. Line drawings should be in laser printer output or in India ink on paper, or board. Use 8 1/2 by 11-inch size sheets if possible, to simplify handling of the manuscript. 3. Each figure should be mentioned in the text and numbered consecutively using Arabic numerals. Specify the desired location of each figure in the text, but place the figure itself of a separate page following the text. 4. Number each table consecutively using Arabic numerals. Please label any material that can be typeset as a table, reserving the term "figure" for material that has been drawn. Specify the desired location of each table in the text, but place the table itself on a separate page following the text. Type a brief title above each table. 5. All lettering should be large enough to permit legible reduction. 6. Photographs should be glossy prints, of good contrast and gradation, and any reasonable size. 7. Number each original on the back. 8. Provide a separate sheet listing all figure captions, in proper style for the typesetter, e.g., "Figure 3. Examples of the fault coverage of random vectors in (a) combinational and (b) sequential circuits." PROOFING Page proofs for articles to be included in a journal issue will be sent to the contact author for proofing, unless otherwise informed. The proofread copy should be received back by the Publisher within 72 hours. COPYRIGHT It is the policy of Kluwer Academic Publishers to own the copyright of all contributions it publishes. To comply with the U.S. Copyright Law, authors are required to sign a copyright transfer form before publication. This form returns to authors and their employers full rights to reuse their material for their own purposes. Authors must submit a signed copy of this form with their manuscript. REPRINTS Each group of authors will be entitled to 50 free reprints of their paper. ************************************ * SUBSCRIPTION INFORMATION: * ************************************ ***Ordering options: 1. You may order through your usual ordering agent, or 2. 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