http://reply.papertrans.cn/2/196/19548/19548-21.png
Submitted on: 03 January 2001.
Revised on: 19 April 2001.
Accepted on: 06 June 2001.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
Submitted on: 07 June 2013.
Revised on: 23 September 2013.
Accepted on: 15 November 2013.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
http://reply.papertrans.cn/2/196/19548/19548-24.png
Submitted on: 22 November 2024.
Revised on: 19 March 2025.
Accepted on: 01 April 2025.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
http://reply.papertrans.cn/2/196/19548/19548-26.png
http://reply.papertrans.cn/2/196/19548/19548-27.png
Submitted on: 17 October 2008.
Revised on: 13 January 2009.
Accepted on: 31 January 2009.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
http://reply.papertrans.cn/2/196/19548/19548-29.png
Submitted on: 16 June 2018.
Revised on: 19 July 2018.
Accepted on: 07 September 2018.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY