Article PDF
Use our pre-submission checklist
Avoid common mistakes on your manuscript.
Rights and permissions
About this article
Cite this article
Meetings of the seminar "Algebra and logic". Algebr Logic 9, 152 (1970). https://doi.org/10.1007/BF02218983
Issue Date:
DOI: https://doi.org/10.1007/BF02218983