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Computers and Intractability: A Guide to the Theory of NP-Completeness. Series of Books in the Mathematical Sciences (1st ed.). New York: W. H. Freeman and Company. ISBN 9780716710455. MR 0519066. OCLC 247570676.. This book is a classic, developing the theory, then cataloguing many NP-Complete problems. Cook, S.A. (1971). "The complexity of ...
Euler diagram for P, NP, NP-complete, and NP-hard set of problems (excluding the empty language and its complement, which belong to P but are not NP-complete) Main article: P versus NP problem The question is whether or not, for all problems for which an algorithm can verify a given solution quickly (that is, in polynomial time ), an algorithm ...
ISBN. 978-1-4767-4018-8. The Library Book is a 2018 non-fiction book by Susan Orlean about the 1986 fire at the Los Angeles Central Library. It received strongly favorable reviews and became a New York Times Best Seller.
Online public access catalog. The online public access catalog ( OPAC ), now frequently synonymous with library catalog, is an online database of materials held by a library or group of libraries. Online catalogs have largely replaced the analog card catalogs previously used in libraries.
Project Gutenberg ( PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks ." [2] It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. [3] Most of the items in its collection are the full texts of books or individual stories in ...
The P versus NP problem is a major unsolved problem in theoretical computer science. Informally, it asks whether every problem whose solution can be quickly verified can also be quickly solved. Here, quickly means an algorithm that solves the task and runs in polynomial time exists, meaning the task completion time varies as a polynomial ...
The Biodiversity Heritage Library website, an example of a digital library. A digital library (also called an online library, an internet library, a digital repository, a library without walls, or a digital collection) is an online database of digital objects that can include text, still images, audio, video, digital documents, or other digital media formats or a library accessible through the ...
Headquarters. Boston, Massachusetts, US. Executive director. John Bracken. Website. dp .la. The Digital Public Library of America ( DPLA) is a US project aimed at providing public access to digital holdings in order to create a large-scale public digital library. It officially launched on April 18, 2013, after two-and-a-half years of development.