良擬序数学分支序理论中,良擬序或良預序(英語:well-quasi-ordering,簡寫作wqo或WQO)是特殊的擬序,其元素的任意无穷序列 x 0 , x 1 , x 2 , … {\displaystyle x_{0},x_{1},x_{2},\ldots } 中,必有先後兩項遞增,即存在 i <
約瑟夫·克魯斯卡爾awarded a BS in 1948 and an MS in 1949 by Chicago. Kruskal, J. B. Well-quasi-ordering, the Tree Theorem, and Vazsonyi's conjecture. Transactions of the
图子式Marcin; Raymond, Jean-Florent; Trunck, Théophile, Induced minors and well-quasi-ordering, Bibcode:2015arXiv151007135B, arXiv:1510.07135 (英语) . Bollobás,