WorldCat Identities

Gandhi, Rajiv 1969-

Works: 3 works in 3 publications in 1 language and 4 library holdings
Roles: Author
Classifications: QA76.M3,
Publication Timeline
Most widely held works by Rajiv Gandhi
Broadcast scheduling by Rajiv Gandhi( )

1 edition published in 2003 in English and held by 2 WorldCat member libraries worldwide

Approximation algorithms for partial covering problems by Rajiv Gandhi( Book )

1 edition published in 2001 in English and held by 1 WorldCat member library worldwide

We study the generalization of covering problems to partial covering. Here we wish to cover only a desired number of elements, rather than covering all elements as in standard covering problems. For example, in k-set cover, we wish to choose a minimum number of sets to cover at least k elements. For k-set cover, if each element occurs in at most f sets, then we derive a primal-dual f-approximation algorithm (thus implying a 2-approximation for k-vertex cover) in polynomial time. In addition to its simplicity, this algorithm has the advantage of being parallelizable. For instances where each set has cardinality at most three, we obtain an approximation of 4/3. We also present better than 2-approximation algorithms for k-vertex cover on bounded degree graphs, and for vertex cover on expanders of bounded average degree. We obtain a polynomial-time approximation scheme for k-vertex cover on planar graphs, and for covering points in Rd̂ by disks
Domain name based visualization of web histories in a zoomable user interface( Book )

1 edition published in 2000 in English and held by 1 WorldCat member library worldwide

Users of hypertext systems like the World Wide Web (WWW) often find themselves following hypertext links deeper and deeper, only to find themselves "lost" and unable to find their way back to the previously visited pages. We have implemented a web browser companion called Domain Tree Browser (DTB) that builds a tree structured visual navigation history while browsing the web. The Domain Tree Browser organizes the URLs visited based on the domain name of each URL and shows thumbnails of each page in a zoomable window. A usability test was conducted with four subjects
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Audience Level
  Kids General Special  
Audience level: 0.76 (from 0.69 for Approximat ... to 0.82 for Broadcast ...)