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In evolutionary biology, punctuated equilibrium (also called punctuated equilibria) is a theory that proposes that once a species appears in the fossil record, the population will become stable, showing little evolutionary change for most of its geological history. [1] This state of little or no morphological change is called stasis.
The theory posits that most social systems exist in an extended period of stasis, which may be punctuated by sudden shifts leading to radical change. The theory was largely inspired by the evolutionary biology theory of punctuated equilibrium developed by paleontologists Niles Eldredge and Stephen Jay Gould .
Graph homomorphism problem [3]: GT52 Graph partition into subgraphs of specific types (triangles, isomorphic subgraphs, Hamiltonian subgraphs, forests, perfect matchings) are known NP-complete. Partition into cliques is the same problem as coloring the complement of the given graph. A related problem is to find a partition that is optimal terms ...
The court jester hypothesis builds upon the punctuated equilibrium theory of Stephen Gould (1972) [8] by providing a primary mechanism for it. [2] The 2001 paper by Barnosky that is one of the first to use the term appropriate for the Court Jester side of the debate: the Stability hypothesis of Stenseth and Maynard Smith (1984), Vrba's Habitat Theory (1992), Vrba's Turn-over pulse hypothesis ...
It was developed to show how self-organized criticality may explain key features of the fossil record, such as the distribution of sizes of extinction events and the phenomenon of punctuated equilibrium. It is named after Per Bak and Kim Sneppen.
President-elect Donald Trump's criminal conviction should be tossed out because he was elected president, his lawyers say. In a letter made public Wednesday, defense attorneys Todd Blanche and ...
The Richness of Life: the Essential Stephen Jay Gould, London: Jonathan Cape, 2007, ISBN 978-0-09-948867-5 This is an anthology of Gould's writings edited by Paul McGarr and Steven Rose, introduced by Steven Rose. 2007. Punctuated Equilibrium, Cambridge MA: Belknap Press of Harvard University Press, 2007, ISBN 978-0-674-02444-1 Book review
Donald Trump's presidential-election victory has fueled major moves in financial markets. Investors are anticipating tax cuts and looser regulation from Trump. Here are five charts that show how ...