The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2011
Filed:
Mar. 13, 2008
Kang Wu, Fort Collins, CO (US);
Neil G. Jacobson, Los Altos, CA (US);
Kang Wu, Fort Collins, CO (US);
Neil G. Jacobson, Los Altos, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A cycle basis is efficiently determined for a directed graph. A first depth-first search of the directed graph classifies each of the edges of the directed graph to have a type that is one of a within-tree type for an edge within a tree of the first depth first search, a forward type for an edge skipping forward along the tree, a back type for an edge directed back along the tree, or a cross type for an edge between two subtrees of the tree. A second depth-first search of the directed graph determines a respective cycle for each of the edges of the back type. A third depth-first search of the directed graph determines a respective cycle for each of the edges of the cross type that is included a cycle. The basis is output the basis that specifies each of the respective cycles.