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Geometric complexity theory (GCT) is an approach to the P vs. NP and related problems. This article gives its complexity theoretic overview without assuming any background in algebraic geometry or representation theory.

Computational Complexity · Computer Science 2009-08-19 Ketan D. Mulmuley

Geometric complexity theory (GCT) is an approach to the $P$ vs. $NP$ and related problems. A high level overview of this research plan and the results obtained so far was presented in a series of three lectures in the Institute of Advanced…

Computational Complexity · Computer Science 2009-08-19 Ketan D. Mulmuley

Geometric complexity theory (GCT) is an approach to the $P$ vs. $NP$ and related problems through algebraic geometry and representation theory. This article gives a high-level exposition of the basic plan of GCT based on the principle,…

Computational Complexity · Computer Science 2007-09-07 Ketan D. Mulmuley

These are lectures notes for the introductory graduate courses on geometric complexity theory (GCT) in the computer science department, the university of Chicago. Part I consists of the lecture notes for the course given by the first author…

Computational Complexity · Computer Science 2014-08-02 Ketan D. Mulmuley , Milind Sohoni

I survey methods from differential geometry, algebraic geometry and representation theory relevant for the permanent v. determinant problem from computer science, an algebraic analog of the P v. NP problem.

Algebraic Geometry · Mathematics 2015-09-09 J. M. Landsberg

Geometric complexity theory (GCT) is an approach towards separating algebraic complexity classes through algebraic geometry and representation theory. Originally Mulmuley and Sohoni proposed (SIAM J Comput 2001, 2008) to use occurrence…

Computational Complexity · Computer Science 2021-02-16 Markus Bläser , Julian Dörfler , Christian Ikenmeyer

This article belongs to a series on geometric complexity theory (GCT), an approach to the P vs. NP and related problems through algebraic geometry and representation theory. The basic principle behind this approach is called the flip. In…

Computational Complexity · Computer Science 2009-01-22 Ketan D. Mulmuley

We show that most arithmetic circuit lower bounds and relations between lower bounds naturally fit into the representation-theoretic framework suggested by geometric complexity theory (GCT), including: the partial derivatives technique…

Computational Complexity · Computer Science 2017-09-07 Joshua A. Grochow

This article describes a formal strategy of geometric complexity theory (GCT) to resolve the {\em self referential paradox} in the $P$ vs. $NP$ and related problems. The strategy, called the {\em flip}, is to go for {\em explicit proofs} of…

Computational Complexity · Computer Science 2010-09-02 Ketan Mulmuley

This is an expository article on the techniques of quantization as they are applied to Gromov-Witten theory and related areas.

Algebraic Geometry · Mathematics 2013-09-05 Emily Clader , Nathan Priddis , Mark Shoemaker

We discuss the geometry of orbit closures and the asymptotic behavior of Kronecker coefficients in the context of the Geometric Complexity Theory program to prove a variant of Valiant's algebraic analog of the P not equal to NP conjecture.…

Computational Complexity · Computer Science 2011-01-10 Peter Buergisser , J. M. Landsberg , Laurent Manivel , Jerzy Weyman

I describe three geometric approaches to resolving variants of P v. NP, present several results that illustrate the role of group actions in complexity theory, and make a first step towards completely geometric definitions of complexity…

Algebraic Geometry · Mathematics 2010-04-15 J. M. Landsberg

This is an expository paper in which we define projective GIT quotients and introduce toric varieties from this perspective. It is intended primarily for readers who are learning either invariant theory or toric geometry for the first time.

Algebraic Geometry · Mathematics 2007-05-23 Nicholas J. Proudfoot

This paper presents a brief but comprehensive introduction to certain mathematical techniques in General Relativity. Familiar mathematical procedures are investigated taking into account the complications of introducing a non trivial…

Mathematical Physics · Physics 2008-11-06 Andrew DeBenedictis

This paper presents a novel and straight formulation, and gives a complete insight towards the understanding of the complexity of the problems of the so called NP-Class. In particular, this paper focuses in the Searching of the Optimal…

Computational Complexity · Computer Science 2010-06-14 Carlos Barron-Romero

We study the computational complexity of sequences of projective varieties. We define analogues of the complexity classes P and NP for these and prove the NP-completeness of a sequence called the universal circuit resultant. This is the…

Algebraic Geometry · Mathematics 2016-09-12 M. Umut Isik

We give an introduction to some of the recent ideas that go under the name "geometric complexity theory". We first sketch the proof of the known upper and lower bounds for the determinantal complexity of the permanent. We then introduce the…

Computational Complexity · Computer Science 2016-05-10 Peter Bürgisser

Geometric mechanics is usually studied in applied mathematics and most introductory texts are hence aimed at a mathematically minded audience. The present note tries to provide the intuition of geometric mechanics and to show the relevance…

Mathematical Physics · Physics 2012-06-18 Christian Lessig

Many fundamental questions in theoretical computer science are naturally expressed as special cases of the following problem: Let $G$ be a complex reductive group, let $V$ be a $G$-module, and let $v,w$ be elements of $V$. Determine if $w$…

Algebraic Geometry · Mathematics 2021-08-16 J. M. Landsberg

This is a very brief introduction to quantum computing and quantum information theory, primarily aimed at geometers. Beyond basic definitions and examples, I emphasize aspects of interest to geometers, especially connections with asymptotic…

History and Overview · Mathematics 2018-01-19 J. M. Landsberg
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