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Topological complexity for spaces was introduced by M. Farber as a minimal number of continuity domains for motion planning algorithms. It turns out that this notion can be extended to the case of not necessarily commutative C*-algebras.…

Operator Algebras · Mathematics 2017-04-03 Vladimir Manuilov

The complexity of algorithms solving the motion planning problem is measured by a homotopy invariant TC(X) of the configuration space X of the system. Previously known lower bounds for TC(X) use the structure of the cohomology algebra of X.…

Algebraic Topology · Mathematics 2007-07-07 Michael Farber , Mark Grant

We study a generalized motion planning problem involving multiple autonomous robots navigating in a $d$-dimensional Euclidean space in the presence of a set of obstacles whose positions are unknown a priori. Each robot is required to visit…

Algebraic Topology · Mathematics 2025-10-13 Gopal Chandra Dutta , Amit Kumar Paul , Subhankar Sau

We give new lower bounds for the (higher) topological complexity of a space, in terms of the Lusternik-Schnirelmann category of a certain auxiliary space. We also give new lower bounds for the rational topological complexity of a space, and…

Algebraic Topology · Mathematics 2016-01-20 Mark Grant , Gregory Lupton , John Oprea

We study Farber's topological complexity (TC) of Davis' projective product spaces (PPS's). We show that, in many non-trivial instances, the TC of PPS's coming from at least two sphere factors is (much) lower than the dimension of the…

Algebraic Topology · Mathematics 2014-10-01 Jesus Gonzalez , Mark Grant , Enrique Torres-Giese , Miguel Xicotencatl

A topological theory initiated recently by the author uses methods of algebraic topology to estimate numerically the character of instabilities arising in motion planning algorithms. The present paper studies random motion planning…

Algebraic Topology · Mathematics 2007-05-23 Michael Farber

Let $\mathrm{TC}_r(X)$ denote the $r$-th topological complexity of a space $X$. In many cases, the generating function $\sum_{r\ge 1}\mathrm{TC}_{r+1}(X)x^r$ is a rational function $\frac{P(x)}{(1-x)^2}$ where $P(x)$ is a polynomial with…

Algebraic Topology · Mathematics 2020-09-01 Daisuke Kishimoto , Atsushi Yamaguchi

We introduce the effectual topological complexity (ETC) of a $G$-space $X$. This is a $G$-equivariant homotopy invariant sitting in between the effective topological complexity of the pair $(X,G)$ and the (regular) topological complexity of…

Algebraic Topology · Mathematics 2021-02-16 Natalia Cadavid-Aguilar , Jesús González , Bárbara Gutiérrez , Cesar A. Ipanaque-Zapata

We prove an upper bound of higher topological complexity $TC_n(X)$ using higher $\mathcal{D}$-topological complexity $TC_n^{\mathcal{D}}(X)$ of a space $X$. An intermediate invariant $\widetilde{TC}_n(X)$ is used in the proof. We interpret…

Algebraic Topology · Mathematics 2019-12-13 Amit Kumar Paul , Debasis Sen

In this paper we study a notion of topological complexity for the motion planning problem. The topological complexity is a number which measures discontinuity of the process of motion planning in the configuration space X. More precisely,…

Algebraic Topology · Mathematics 2007-05-23 Michael Farber

Let $X$ be a two-cell complex with attaching map $\alpha\colon S^q\to S^p$, and let $C_X$ be the cofiber of the diagonal inclusion $X\to X\times X$. It is shown that the topological complexity (${\rm TC}$) of $X$ agrees with the…

Algebraic Topology · Mathematics 2016-08-01 Jesús González , Mark Grant , Lucile Vandembroucq

In this paper, we transfer the problem of measuring navigational complexity in topological spaces to the nearness theory. We investigate the most important component of this problem, the topological complexity number (denoted by TC), with…

Algebraic Topology · Mathematics 2023-05-24 Melih İs , İsmet Karaca

The main objective of this paper is to introduce a new method for qualitative analysis of various designs of robot arms. To this end we define the complexity of a map, examine its main properties and develop some methods of computation. In…

Algebraic Topology · Mathematics 2017-08-03 Petar Pavešić

We introduce and study the proper topological complexity of a given configuration space, a version of the classical invariant for which we require that the algorithm controlling the motion is able to avoid any possible choice of ``unsafe''…

Algebraic Topology · Mathematics 2025-01-27 Jose M. Garcia-Calcines , Aniceto Murillo

Sequential parametrized topological complexity is a numerical homotopy invariant of a fibration, which arose in the robot motion planning problem with external constraints. In this paper, we study sequential parametrized topological…

Algebraic Topology · Mathematics 2025-03-04 Yuki Minowa

In this paper, we deal with the robot motion planning problem in multi-valued function theory. We first enrich the multi-homotopy studies by introducing a multi-homotopy lifting property and a multi-fibration. Then we compute both a…

Algebraic Topology · Mathematics 2023-10-26 Melih İs

We define and study an equivariant version of Farber's topological complexity for spaces with a given compact group action. This is a special case of the equivariant sectional category of an equivariant map, also defined in this paper. The…

Algebraic Topology · Mathematics 2014-10-01 Hellen Colman , Mark Grant

We study the higher (sequential) topological complexity, a numerical homotopy invariant for the planar polygon spaces. For these spaces with a small genetic codes and dimension $m$, Davis showed that their topological complexity is either…

Algebraic Topology · Mathematics 2025-09-03 Sutirtha Datta , Navnath Daundkar , Abhishek Sarkar

We introduce the geodesic complexity of a metric space, inspired by the topological complexity of a topological space. Both of them are numerical invariants, but, while the TC only depends on the homotopy type, the GC is an invariant under…

Geometric Topology · Mathematics 2021-01-14 David Recio-Mitter

In this paper, we introduce the notion of transversal topological complexity (TTC) for a smooth manifold $X$ with respect to a submanifold of codimension 1 together with basic results about this numerical invariant. In addition, we present…

Algebraic Topology · Mathematics 2023-03-14 Cesar A. Ipanaque Zapata , Fernando R. Chu Rivera