The Golden Chain authenticity. Most accounts are vague on what year the Golden Chain document was written; some say 1988 but U.S. counter-terrorism advisor Richard A. Clarke says it dates from 1989. The "Golden Chain" was presented by the U.S. government in the criminal case "United States v. Arnaout" filed on January 29, 2003, and in other legal filings, which would cause its veracity and meaning to be brought under further scrutiny. The names include: Adel Batterjee is a wealthy Saudi businessman who is also the founder of both BIF and its predecessor, Lajnatt Al-Birr Al-Islamiah. He appears to be mentioned three times.
Spanning tree and "routing loops", many routing protocols designed for such networks—including the Spanning Tree Protocol, Open Shortest Path First, Link-state routing protocol, Augmented tree-based routing, etc.—require each router to remember a spanning tree. A special kind of spanning tree, the Xuong tree, is used in topological graph theory to find graph embeddings with maximum genus. A Xuong tree is a spanning tree such that, in the remaining graph, the number of connected components with an odd number of edges is as small as possible. A Xuong tree and an associated maximum-genus embedding can be found in polynomial time. A tree is