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Complexity

open access: yes, 2011
The term complexity derives etymologically from the Latin plexus, which means interwoven. Intuitively, this implies that something complex is composed by elements that are difficult to separate.
Gershenson, Carlos
core   +3 more sources

Restricted Complexity, General Complexity [PDF]

open access: yesWorldviews, Science and Us, 2006
Why has the problematic of complexity appeared so late?
Morin, Edgar
core   +7 more sources

Complex complex landscapes [PDF]

open access: yesPhysical Review Research, 2021
We study the saddle-points of the $p$-spin model -- the best understood example of a `complex' (rugged) landscape -- when its $N$ variables are complex. These points are the solutions to a system of $N$ random equations of degree $p-1$. We solve for $\overline{\mathcal N}$, the number of solutions averaged over randomness in the $N\to\infty$ limit.
Jaron Kent-Dobias, Jorge Kurchan
openaire   +5 more sources

Complexes from Complexes [PDF]

open access: yesFoundations of Computational Mathematics, 2021
This paper is concerned with the derivation and properties of differential complexes arising from a variety of problems in differential equations, with applications in continuum mechanics, relativity, and other fields. We present a systematic procedure which, starting from well-understood differential complexes such as the de Rham complex, derives new ...
Kaibo Hu, Douglas N. Arnold
openaire   +2 more sources

Studying Complexity is Complex [PDF]

open access: yesJournal of General Internal Medicine, 2007
This supplement contains 9 articles that arose from a Department of Veterans Affairs sponsored State of the Art (SOTA) conference “Managing Complexity in Chronic Care.” It is appropriate that these articles appear in the Journal of General Internal Medicine.
Hayden B. Bosworth   +3 more
openaire   +2 more sources

Theory of Change [PDF]

open access: yes, 2021
Horizon 2045 (H2045) is a 25-year initiative to end the nuclear weapons century. We urgently need to manage the intertwined existential risks of the Anthropocene—the geological era that began with the 1945 Trinity Test and is characterized by humankind’s
Center for Complexity,
core   +1 more source

The complexity of cutting complexes [PDF]

open access: yesDiscrete & Computational Geometry, 1989
This paper investigates the combinatorial and computational aspects of certain extremal geometric problems in two and three dimensions. Specifically, we examine the problem of intersecting a convex subdivision with a line in order to maximize the number of intersections.
Chazelle, B.   +2 more
openaire   +1 more source

Circuit complexity, proof complexity, and polynomial identity testing [PDF]

open access: yes, 2014
We introduce a new algebraic proof system, which has tight connections to (algebraic) circuit complexity. In particular, we show that any super-polynomial lower bound on any Boolean tautology in our proof system implies that the permanent does not have ...
Grochow, Joshua A., Pitassi, Toniann
core   +2 more sources

Complexity and Multiple Complexes

open access: yesMathematische Zeitschrift, 1987
In this chapter we introduce the notion of the complexity of a module and explore some related ideas. Complexity was first defined by Jon Alperin in the late 1970’s and it helped to motivate much of the development of the homological properties of modules.
Jon F. Carlson   +3 more
openaire   +2 more sources

Simplicial complexes and complex systems [PDF]

open access: yesEuropean Journal of Physics, 2018
© 2018 European Physical Society. We provide a short introduction to the field of topological data analysis (TDA) and discuss its possible relevance for the study of complex systems. TDA provides a set of tools to characterise the shape of data, in terms of the presence of holes or cavities between the points.
Renaud Lambiotte   +3 more
openaire   +4 more sources

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