Hacker Dictionary
Browse the Dictionary...
All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Navigation Random Term
  • kamikaze packet
    n. The `official' jargon for what is more commonly called a {Christmas tree packet}. RFC-1025, `TCP and IP Bake Off' says ... VIEW ENTIRE DEFINITION

  •  View Definition: NP- 


    /N-P/ pref. Extremely. Used to modify adjectives describing a level or quality of difficulty; the connotation is often `more so than it should be' (NP-complete problems all seem to be very hard, but so far no one has found a good a priori reason that they should be.) "Coding a BitBlt implementation to perform correctly in every case is NP-annoying." This is generalized from the computer-science terms `NP-hard' and `NP-complete'. NP is the set of Nondeterministic-Polynomial algorithms, those that can be completed by a nondeterministic Turing machine in an amount of time that is a polynomial function of the size of the input; a solution for one NP-complete problem would solve all the others. Note, however, that the NP- prefix is, from a complexity theorist's point of view, the wrong part of `NP-complete' to connote extreme difficulty; it is the completeness, not the NP-ness, that puts any problem it describes in the `hard' category.