@Article{MC-11-1, author = {}, title = {封面}, journal = {数学文化}, year = {2020}, volume = {11}, number = {1}, pages = {0--0}, abstract = {}, issn = {2617-8656}, doi = {https://doi.org/2020-MC-15438}, url = {https://global-sci.com/article/89298/%E5%B0%81%E9%9D%A2} }