In 1911, M. Dehn gave three fundamental problems in combinatorial group theory: word problem, conjugacy problem and isomorphism problem.
1911年,M.Dehn提出了组合群论的三个基本问题,即:字问题、共轭问题、同构问题。
参考来源 - 群的共轭性质与可分性质·2,447,543篇论文数据,部分数据来源于NoteExpress
本文介绍了《规范汉字表》研制过程中对异体字问题的思考和对异体字处理的初步意见。
This paper analyzes Yupian of Song Dynasty and discusses the variant forms of Chinese characters in it: their definition, origin, structure and relations with other words.
他只是用一个“是”字,便回答了两个问题。
我将用博客空间里濒临灭绝的三个字在回答这个问题。
I'll answer that question with the three most endangered words in the blogosphere.
It's not just 140 characters, it's potentially $140 because they can't make the sale.
这并不只是140个字符的问题,它只是潜在的140美元,因为这些字不能卖出去。
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