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2004年，数学家埃尔德什数为4的William Tozier在eBay上拍卖了合著者，因此为买家提供了埃尔德什数为5的机会。一位西班牙数学家发布了1031美元的中标价格，不过他并不打算付款，而只是提出了中标要求，以阻止他认为是嘲弄的行为。
2004年，数学家埃尔德什数为4的William Tozier在eBay上拍卖了合著者，因此为买家提供了埃尔德什数为5的机会。一位西班牙数学家发布了1031美元的中标价格，不过他并不打算付款，而只是提出了中标要求，以阻止他认为是嘲弄的行为。
==Variations==
== Variations 演变 ==
A number of variations on the concept have been proposed to apply to other fields.
A number of variations on the concept have been proposed to apply to other fields.
A number of variations on the concept have been proposed to apply to other fields.
A number of variations on the concept have been proposed to apply to other fields.
目前出现了很多对该概念进行变型的提议以应用于其他领域。
The best known is the Bacon number (as in the game Six Degrees of Kevin Bacon), connecting actors that appeared in a film together to the actor Kevin Bacon. It was created in 1994, 25 years after Goffman's article on the Erdős number.
The best known is the Bacon number (as in the game Six Degrees of Kevin Bacon), connecting actors that appeared in a film together to the actor Kevin Bacon. It was created in 1994, 25 years after Goffman's article on the Erdős number.
最著名的是游戏《与凯文·培根的六度分隔》中的培根数，将电影中出现的演员与演员凯文·培根联系在一起。它开始于1994年，距高夫曼关于埃尔德什数的文章发表25年。
A small number of people are connected to both Erdős and Bacon and thus have an [[Erdős–Bacon number]], which combines the two numbers by taking their sum. One example is the actress-mathematician [[Danica McKellar]], best known for playing Winnie Cooper on the TV series ''[[The Wonder Years]]''.
A small number of people are connected to both Erdős and Bacon and thus have an [[Erdős–Bacon number]], which combines the two numbers by taking their sum. One example is the actress-mathematician [[Danica McKellar]], best known for playing Winnie Cooper on the TV series ''[[The Wonder Years]]''. Her Erdős number is 4, and her Bacon number is 2.
A small number of people are connected to both Erdős and Bacon and thus have an Erdős–Bacon number, which combines the two numbers by taking their sum. One example is the actress-mathematician Danica McKellar, best known for playing Winnie Cooper on the TV series The Wonder Years.
A small number of people are connected to both Erdős and Bacon and thus have an Erdős–Bacon number, which combines the two numbers by taking their sum. One example is the actress-mathematician Danica McKellar, best known for playing Winnie Cooper on the TV series The Wonder Years. Her Erdős number is 4, and her Bacon number is 2.
很少一部分人同时与埃尔德什和培根相连，因此有一个埃尔德什-培根数，该数通过求和将两个数相加。一个例子是女演员兼数学家丹妮卡·麦凯拉Danica McKellar，她在电视连续剧《纯真年代》中扮演温妮·库珀而闻名。她的埃尔德什数是4，她的培根数是2。
Further extension is possible. For example, the "Erdős–Bacon–Sabbath number" is the sum of the Erdős–Bacon number and the collaborative distance to the band [[Black Sabbath]] in terms of singing in public. Physicist [[Stephen Hawking]] had an Erdős–Bacon–Sabbath number of 8, and actress [[Natalie Portman]] has one of 11 (her Erdős number is 5).
Further extension is possible. For example, the "Erdős–Bacon–Sabbath number" is the sum of the Erdős–Bacon number and the collaborative distance to the band [[Black Sabbath]] in terms of singing in public. Physicist [[Stephen Hawking]] had an Erdős–Bacon–Sabbath number of 8,<ref>{{cite web|url=https://www.timeshighereducation.com/blog/whats-your-erdos-bacon-sabbath-number |title=What's your Erdős–Bacon–Sabbath number? |website=[[Times Higher Education]] |date=2016-02-17 |access-date=2018-07-29 |last=Fisher |first=Len}}</ref> and actress [[Natalie Portman]] has one of 11 (her Erdős number is 5).<ref>{{cite web|url=http://blogs.surrey.ac.uk/physics/2012/09/15/erdos-bacon-sabbath-numbers/comment-page-1/ |title=Erdős–Bacon–Sabbath numbers |date=2012-09-15 |access-date=2018-07-29 |last=Sear |first=Richard |website=Department of Physics, [[University of Surrey]]}}</ref>
Further extension is possible. For example, the "Erdős–Bacon–Sabbath number" is the sum of the Erdős–Bacon number and the collaborative distance to the band Black Sabbath in terms of singing in public. Physicist Stephen Hawking had an Erdős–Bacon–Sabbath number of 8, and actress Natalie Portman has one of 11 (her Erdős number is 5).
Further extension is possible. For example, the "Erdős–Bacon–Sabbath number" is the sum of the Erdős–Bacon number and the collaborative distance to the band Black Sabbath in terms of singing in public. Physicist Stephen Hawking had an Erdős–Bacon–Sabbath number of 8, and actress Natalie Portman has one of 11 (her Erdős number is 5).
以此类推可以进一步扩展，例如，“埃尔德什-培根–萨巴什数”是“埃尔德什-培根数”在大众音乐领域与黑色安息日Black Sabbath乐队的协作距离总和。物理学家斯蒂芬·霍金Stephen Hawking的埃尔德什–培根–萨巴什数为8，女演员娜塔莉·波特曼Natalie Portman的埃德斯–培根–萨巴什数为11（她的埃尔德什数为5）。
== See also ==
== See also ==