这类问题中的每个问题称为NP完全(NP-Complete,NPC)。 NP-Hard问题 如果判定问题A满足A∈NP且NP中的任何一个问题都可在多项式时间内规约为A,则称A为NP完全(NP-Complete,NPC)。若NP中的任何一个问题都可以在多项式时间规约为判定问题A,则称A为NP难(NP-Hard,NPH)。 显然NPC⊆NPH。 NP完全和NP难问题的区别...
https://www.quora.com/How-do-you-explain-NP-Complete-and-NP-hard-to-a-child https://en.wikipedia.org/wiki/Time_complexity#Polynomial_time https://www.quora.com/Which-is-a-better-intuition-on-P-NP-NP-Complete-or-NP-Hard
NPno penalty NPNetwork Processor NPNo Picture NPNonviolent Peaceforce NPNondeterministic-Polynomial NPNumbering Plan NPNegative Polarity NP1-Nitropyrene NPNeper(unit used to express ratios, such as gain, loss, and relative values) NPNational President ...
Alternatively called NP-C or NPC, NP-Complete is a classification of problems in computer science. NP-complete problems are verified but not solved by a computer in a reasonable time. The "NP" stands for "non-deterministic polynomial time" and refers to how long a computer would take to ...
Within the realm of NP problems, we encounter two subcategories: NP-complete and NP-hard problems. NP-complete Problems Among NP problems, NP-complete problems stand out as the most challenging. An NP-complete problem is one that is in NP and exhibits a special property: if you could f...
I'm not going to explain all the terms I already used like NP and NP-complete. But I will explain why the P≠NP is important. Since it is not yet proven, this comes down to the fact that nobody knows whether problems that can be verified quickly can also be solved quickly. In thi...
The main trick is to make a conditional copy of that is conditionally independent of subject to the constraint . The point here is that this constrant implies the inclusions and Because of the -spread hypothesis, it is hard for to contain any fixed large set. If we could apply this ...
-What's the___of your good grades?-Hard work and carefulness,I think.( ) A. course B. secret C. meaning D. plan答案句意:--你取得好成绩秘诀是什么?--我想是努力和细心。A.过程;B.秘诀;C.意思;D.计划。根据答句"努力和细心"可知,这里指的是"取得好成绩的秘诀",所以s...
To get an oracle such that , one basically sets to be a powerful simulator that can simulate non-deterministic machines (and, furthermore, can also simulate itself); it turns out that any PSPACE-complete oracle would suffice for this task. To get an oracle for which , one has to be a...
NP-complete: problems in NP for which we could translate all other problems in NP into. The most famous example of an NP-complete problem is SAT, in which given a logical formula with boolean variables, you ask whether or not there is a satisfying assignment of variables, variables that ...