For example, a nondeterministic Turing machine will have a choice of moves to make for a given internal state and tape symbol being read. After a choice has been made, other choice-points will be encountered. There is therefore a tree whose paths are all possible different computations, and whose nonterminal nodes represent choice-points. If, for example, the algorithm performs some kind of “search”, then the search succeeds if at least one sequence of choices (path through the tree) is successful.
Nondeterministic constructs in programming languages can offer a choice of control, e.g. do S1 or S2 od
or a choice of data, e.g. y := ? and y := x.R(x);
These latter select a value for y randomly and such that it satisfies test R. Many algorithms are expressed most conveniently using such constructs; nondeterminism also arises naturally in connection with interleaving and concurrency.
Nondeterminism is important in the field of complexity: it is believed that a nondeterministic Turing machine is capable of performing in “reasonable time” computations that could not be so performed by any deterministic Turing machine (see P=NP question).
"nondeterminism." A Dictionary of Computing. . Encyclopedia.com. (October 21, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/nondeterminism
"nondeterminism." A Dictionary of Computing. . Retrieved October 21, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/nondeterminism
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.