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In bifurcation theory, a field within mathematics, a pitchfork bifurcation is a particular type of local bifurcation where the system transitions from one fixed point to three fixed points. Pitchfork bifurcations, like Hopf bifurcations , have two types – supercritical and subcritical.
Symmetry breaking in pitchfork bifurcation as the parameter ε is varied. ε = 0 is the case of symmetric pitchfork bifurcation.. In a dynamical system such as ¨ + (;) + =, which is structurally stable when , if a bifurcation diagram is plotted, treating as the bifurcation parameter, but for different values of , the case = is the symmetric pitchfork bifurcation.
If the eigenvalue is equal to one, the bifurcation is either a saddle-node (often called fold bifurcation in maps), transcritical or pitchfork bifurcation. If the eigenvalue is equal to −1, it is a period-doubling (or flip) bifurcation, and otherwise, it is a Hopf bifurcation. Examples of local bifurcations include: Saddle-node (fold) bifurcation
In the symmetrical case b = 0, one observes a pitchfork bifurcation as a is reduced, with one stable solution suddenly splitting into two stable solutions and one unstable solution as the physical system passes to a < 0 through the cusp point (0,0) (an example of spontaneous symmetry breaking). Away from the cusp point, there is no sudden ...
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Diagram showing pitchfork bifurcation geometry given by a slice through cusp catastrophe. Date: 1 December 2005: Source: Created in OpenOffice Draw, exported as SVG, size explicitly added in text editor. Author: Jheald: SVG development
In mathematics, specifically bifurcation theory, the Feigenbaum constants / ˈ f aɪ ɡ ə n b aʊ m / [1] δ and α are two mathematical constants which both express ratios in a bifurcation diagram for a non-linear map. They are named after the physicist Mitchell J. Feigenbaum.
Bifurcation diagram for the Rössler attractor for varying Here, a {\displaystyle a} is fixed at 0.2, c {\displaystyle c} is fixed at 5.7 and b {\displaystyle b} changes. As shown in the accompanying diagram, as b {\displaystyle b} approaches 0 the attractor approaches infinity (note the upswing for very small values of b {\displaystyle b} ).