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标题：A Survey on Just-Non-<svg style="vertical-align:-0.558pt;width:17.225px;" id="M1" height="16.4" version="1.1" viewBox="0 0 17.225 16.4" width="17.225" xmlns="http://www.w3.org/2000/svg"> <g transform="matrix(1.25,0,0,-1.25,0,16.4)"> <g transform="translate(72,-58.88)"> <text transform="matrix(1,0,0,-1,-71.95,59.49)"> <tspan style="font-size: 17.93px; " x="0" y="0">𝔛</tspan> </text> </g> </g> </svg> Groups
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作者：Daniele Ettore Otera ; Francesco G. Russo
期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：2010
卷号：2010
DOI：10.1155/2010/190830
出版社：Hindawi Publishing Corporation
摘要：Let 𝔛 be a class of groups. A group which does not belong to 𝔛 but all of whose proper quotient groups belong to 𝔛 is called just-non-𝔛 group. The present note is a survey of recent results on the topic with a special attention to topological groups.