You do not have full access to this article.
Already a Subscriber? Sign in as an individual or via your institution
Journal Article Details
Publisher Name: Global Science Press
Language: Chinese
DOI: https://doi.org/2021-MC-18691
数学文化, Vol. 12 (2021), Iss. 1 : pp. 113–117
Published online: 2021-01
AMS Subject Headings:
Copyright: COPYRIGHT: © Global Science Press
Pages: 5