In computational complexity, problems that are in the complexity class NP but are neither in the class P nor NP-complete are called NP-intermediate, and the class of such problems is called NPI. Ladner's theorem, shown in 1975 by Richard E. Ladner, is a result asserting that, if P ≠ NP, then NPI is not empty; that is, NP contains problems that are neither in P nor NP-complete. Since it is also true that if NPI problems exist, then P ≠ NP, it follows that P = NP if and only if NPI is empty. Under the assumption that P ≠ NP, Ladner explicitly constructs a problem in NPI, although this problem is artificial and otherwise uninteresting. It is an open question whether any "natural" problem has the same property: Schaefer's dichotomy theorem provides conditions under which classes of constrained Boolean satisfiability problems cannot be in NPI. Some problems that are considered good candidates for being NP-intermediate are the graph isomorphism problem, factoring, and computing the discrete logarithm. (Wikipedia).
Intermediate Algebra Lecture C.1: A BRIEF Review of Solving Equations and Factoring
https://www.patreon.com/ProfessorLeonard Intermediate Algebra Lecture C.1: A BRIEF Review of Solving Equations and Factoring
From playlist Intermediate Algebra (Full Length Videos)
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From playlist A Second Course in Differential Equations
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From playlist Intermediate Algebra (Full Length Videos)
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From playlist A Second Course in Differential Equations
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From playlist IIT Madras: Introduction to Modern Linguistics | CosmoLearning.org English Language
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From playlist IIT Madras: Introduction to Modern Linguistics | CosmoLearning.org English Language
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From playlist MIT 18.404J Theory of Computation, Fall 2020
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From playlist Add/Subtract Rational Expressions (Binomials) #Rational
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MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Introduced space complexity. Defined S
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This tutorial explains the difference between rational and irrational numbers. Join this channel to get access to perks: https://www.youtube.com/channel/UCn2SbZWi4yTkmPUj5wnbfoA/join :)
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