positive axis

positive axis

[′päz·əd·iv ′ak·səs]
(mathematics)
The segment of an axis arising from a cartesian coordinate system which is realized by positive values of the coordinate variables.
(meteorology)
In tropical synoptic analysis, a locus of maximum streamline curvature in an easterly wave; used primarily in the analysis of waves that span the equatorial trough (equatorial waves); a positive axis corresponds to a trough line in the Northern Hemisphere and a ridge line in the Southern Hemisphere.
References in periodicals archive ?
Then A is commutative if and only if there exists a convex function on the positive axis I = [0, [infinity]) which is not a 2-convex function f but an A-convex function.
Conversely, suppose that there exists a convex function on the positive axis I = [0, [infinity]) which is not 2-convex function fbut an A-convex function.
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