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! Year !! colspan="2"|Distance
! Year !! colspan="2"|Distance
|-
|-
| 2008 || {{bartable|5.28||20}}
| 2008 || 5.28
|-
|-
| 2011 || {{bartable|4.74||20}}
| 2011 || 4.74
|-
|-
| 2016 || {{bartable|4.57||20}}
| 2016 || 4.57
|-
|-
| colspan="3"|Distances as reported in Feb 2016 <ref name="facebook2016" /><ref>{{cite news|title=Facebook says there are only 3.57 degrees of separation|newspaper=The Telegraph|date=4 February 2016|url=https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-url=https://ghostarchive.org/archive/20220112/https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-date=2022-01-12 |url-access=subscription |url-status=live|access-date=4 February 2016|last1=Titcomb|first1=James}}{{cbignore}}</ref>
| colspan="3"|Distances as reported in Feb 2016 <ref name="facebook2016" /><ref>{{cite news|title=Facebook says there are only 3.57 degrees of separation|newspaper=The Telegraph|date=4 February 2016|url=https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-url=https://ghostarchive.org/archive/20220112/https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-date=2022-01-12 |url-access=subscription |url-status=live|access-date=4 February 2016|last1=Titcomb|first1=James}}{{cbignore}}</ref>
Facebook的数据团队在2011年11月发布了两篇论文，其中记录了在研究时的所有Facebook用户中（7.21亿用户，690亿条友谊链接）<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> ，平均距离为4.74。<ref name="SDS-T-01">{{cite news|url=https://www.telegraph.co.uk/technology/facebook/8906693/Facebook-cuts-six-degrees-of-separation-to-four.html|title=Facebook cuts six degrees of separation to four|work=Telegraph|accessdate=7 May 2012|first=Emma|last=Barnett|date=22 November 2011}}</ref><ref name="facebook2016" /> 研究还发现，99.91%的Facebook用户是相互联系的，形成了一个大的连接部分<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> <ref>{{cite arXiv|eprint=1111.4503|title=The Anatomy of the Facebook Social Graph|last=Ugander|first=Johan|author2=Karrer, Brian |author3=Backstrom, Lars |author4= Marlow, Cameron |class=cs.SI|year=2011}}</ref>。据 Facebook 报道，2016年2月，这个数字降到了4.57，当时 Facebook 拥有16亿用户(约占世界人口的22%)。
Facebook的数据团队在2011年11月发布了两篇论文，其中记录了在研究时的所有Facebook用户中（7.21亿用户，690亿条友谊链接）<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> ，平均距离为4.74。<ref name="SDS-T-01">{{cite news|url=https://www.telegraph.co.uk/technology/facebook/8906693/Facebook-cuts-six-degrees-of-separation-to-four.html|title=Facebook cuts six degrees of separation to four|work=Telegraph|accessdate=7 May 2012|first=Emma|last=Barnett|date=22 November 2011}}</ref><ref name="facebook2016" /> 研究还发现，99.91%的Facebook用户是相互联系的，形成了一个大的连接部分<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> <ref>{{cite arXiv|eprint=1111.4503|title=The Anatomy of the Facebook Social Graph|last=Ugander|first=Johan|author2=Karrer, Brian |author3=Backstrom, Lars |author4= Marlow, Cameron |class=cs.SI|year=2011}}</ref>。据 Facebook 报道，2016年2月，这个数字降到了4.57，当时 Facebook 拥有16亿用户(约占世界人口的22%)。
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====领英 LinkedIn====
====领英 LinkedIn====