Conway’s Work on Iteration In memory of John Horton Conway (1937–2020)

Conway’s Work on Iteration In memory of John Horton Conway (1937–2020)
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康威的迭代工作纪念约翰·霍顿·康威(1937 年至 2020 年)

DOI:
10.1007/s00283-021-10095-5
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发表时间:
2021
期刊:
The Mathematical Intelligencer
影响因子:
--
通讯作者:
Lagarias, Jeffrey C.
Lagarias, Jeffrey C.
中科院分区:
--
文献类型:
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作者:
Lagarias, Jeffrey C.

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20 世纪 80 年代 AT&T 贝尔实验室的研究中心。约翰每周来贝尔实验室一次,与尼尔·J·A·斯隆 (Neil JA Sloane) 一起撰写《球体堆积、格子和群》一书。在一次午餐聚会上,他解释了对特定多骨牌平铺问题的可解性的群论限制。这导致了联合工作[18]。当我遇见康威时,他已经举世闻名。他构造了新的有限单群;他创造了一种(超现实的)数字和游戏理论;他在结理论中发明了新的多项式。他的个性非常出众,但又很平易近人。我对他很敬畏。约翰喜欢从简单的规则开始,逐渐发展出复杂的事情。他们通向何方?有时,这些规则会导致完全清晰的涌现模式,有时会导致不可预测性和计算上无法判定的问题。约翰喜欢看起来到处都一样的数学对象,既有内部结构,又有大的(传递)对称群。他喜欢寻找新的不变量来区分事物,提供分类。约翰喜欢数字、模式和实验计算。他通过缠结理论列举了许多结和链接,并用数字标记了结[9]。他与 Simon P. Norton 一起制定了 Monstrous Moonshine,将连接两个不同领域的意想不到的数字模式制成表格,即 Monster 单群和模函数,包括 j 函数 [19]。他的学生理查德·博彻兹(Richard Borcherds)追寻了这些模式,并在多年后证明了它们。
Research Center at AT&T Bell Laboratories in the 1980s. John was coming to Bell Labs once a week to work with Neil JA Sloane on their book Sphere Packings, Lattices and Groups. At one lunch gathering, he explained a grouptheoretic restriction on solvability of a particular polyomino tiling problem. This led to joint work [18]. At the time I met Conway, he was world-famous. He had constructed new finite simple groups; he had created a theory of (surreal) numbers and games; he had invented new polynomials in knot theory. His personality was outsized, yet he was approachable. I was in awe of him. John liked to start with simple rules that built up to complicated things. Where did they lead? Sometimes the rules led to complete clear emergent patterns, sometimes to unpredictability and computationally undecidable problems. John liked mathematical objects that looked the same everywhere, having internal structure yet also having large (transitive) symmetry groups. He liked finding new invariants that tell things apart, providing a classification. John liked numbers, and patterns, and experimental computations. He enumerated many knots and links via his theory of tangles, labeling knots with numbers [9]. With Simon P. Norton, he formulated Monstrous Moonshine, tabulating unexpected patterns of numbers connecting two different fields, the Monster simple group and modular functions, including the j-function [19]. These patterns were pursued by his student Richard Borcherds, who proved them many years later.
DOI: --
发表时间: 1963
期刊:
影响因子: --
作者:
M. Klamkin
通讯作者: M. Klamkin
对问题发表评论
DOI: --
发表时间: 1983
期刊:
影响因子: --
作者:
O. B. Keyes
通讯作者: O. B. Keyes
DOI: --
发表时间: 1996
期刊: Canadian Journal of Mathematics - Journal Canadien de Mathematiques
影响因子: --
作者:
D. Bernstein;Jeffrey C. Lagarias
通讯作者: Jeffrey C. Lagarias
有序集上的豪斯多夫
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
J. Plotkin
通讯作者: J. Plotkin
DOI: --
发表时间: 1964
期刊:
影响因子: --
作者:
J. Conway
通讯作者: J. Conway