Isocline
Given a family of curves, assumed to be differentiable, an isocline for that family is formed by the set of points at which some member of the family attains a given slope. The word comes from the Greek words ἴσος (isos), meaning "same", and the κλίνειν, meaning "make to slope". Generally, an isocline will itself have the shape of a curve or the union of a small number of curves.
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Isoclines are often used as a graphical method of solving ordinary differential equations. In an equation of the form y' = f(x, y), the isoclines are lines in the (x, y) plane obtained by setting f(x, y) equal to a constant. This gives a series of lines (for different constants) along which the solution curves have the same gradient. By calculating this gradient for each isocline, the slope field can be visualised; making it relatively easy to sketch approximate solution curves; as in fig. 1.
Other uses
In population dynamics, the term "isocline" refers to the set of population sizes at which the rate of change for one population in a pair of interacting populations is zero.[1]
References
- "INTERSPECIFIC COMPETITION: LOTKA-VOLTERRA". Retrieved 6 March 2019.
- Hanski, I. (1999) Metapopulation Ecology. Oxford University Press, Oxford, pp. 43–46.
- Mathworld: Isocline