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backtracking    音标拼音: [b'æktr,ækɪŋ]
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backtracking
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backtracking
回溯法

A scheme for solving a series of sub-problems each
of which may have multiple possible solutions and where the
solution chosen for one sub-problem may affect the possible
solutions of later sub-problems.

To solve the overall problem, we find a solution to the first
sub-problem and then attempt to recursively solve the other
sub-problems based on this first solution. If we cannot, or
we want all possible solutions, we backtrack and try the next
possible solution to the first sub-problem and so on.
Backtracking terminates when there are no more solutions to
the first sub-problem.

This is the algorithm used by {logic programming} languages
such as {Prolog} to find all possible ways of proving a
{goal}. An optimisation known as "{intelligent backtracking}"
keeps track of the dependencies between sub-problems and only
re-solves those which depend on an earlier solution which has
changed.

Backtracking is one {algorithm} which can be used to implement
{nondeterminism}. It is effectively a {depth-first search} of
a {problem space}.

(1995-04-13)


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英文字典中文字典相关资料:


  • 1 - Wikipedia
    1 (one, unit, unity) is a number, numeral, and grapheme It is the first and smallest positive integer of the infinite sequence of natural numbers
  • I Can Show the Number 1 in Many Ways - YouTube
    Learn the different ways number 1 can be represented See the number one on a number line, five frame, ten frame, numeral, word, dice, dominoes, tally mark, finger more
  • 1 - Wiktionary, the free dictionary
    Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ (1, “éka”)), possibly influenced by Roman numeral Ⅰ, both ultimately from using a single stroke to represent the number one
  • 1 (number) - New World Encyclopedia
    The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, as is still the case in Chinese script
  • 1 (number) | Math Wiki | Fandom
    1 is the natural number exceeding 0 and preceding 2, the Hindu-Arabic numeral for the number one (the unit) It is the smallest positive integer, and smallest natural number 1 is the multiplicative identity, i e any number multiplied by 1 equals itself, for example: a ⋅ 1 = a {\displaystyle a
  • 1 - Wikiwand
    The number 1 is the first natural number after 0 Each natural number, including 1, is constructed by succession, that is, by adding 1 to the previous natural number
  • Number 1 facts
    The meaning of the number 1: How is 1 written in letters, facts, mathematics, computer science, numerology, codes Phone prefix +1 or 001 1 in Roman Numerals and Images
  • The number one - Britannica
    The number 1 symbolized unity and the origin of all things, since all other numbers can be created from 1 by adding enough copies of it For example, 7 = 1 + 1 + 1 + 1 + 1 + 1 + 1
  • About The Number 1 - numeraly. com
    The number 1 is unique in many ways, and holds a fascinating position in the world of mathematics, science, and culture As the first whole number, it is the foundation for all other numbers and serves as the starting point for counting
  • Number 1 - Curious Math Facts and Interesting Properties
    In a nutshell 1 is an odd number which is uniquely neither prime nor composite It is known as the multiplicative identity or unit It’s also the only positive number with no other divisors





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