Concave

Property that a curve is below a straight line connecting two end points. If the curve falls above the straight line, it is called convex.

Concave

Describing a curve segment whose ends fall below an arbitrarily set straight line. Concave properties are important to charting; for example, when tracking a stock market's performance, a dip in the chart with respect to the previous day's close followed by a rally going up to but not necessarily meeting that close may be described as a concave curve.

Mentioned in

Convexity

References in periodicals archive

(32.) In general, risk aversion means that (cardinal) utility is concavely increasing in monetary gains' CRRA relies on U([PI]) = [[PI].sup.1 - [rho]]/1 - [rho] with constant parameter [rho].

Bargaining under large risk--an experimental analysis

Watching my high-tech thermopane windows flex concavely as the drapes sway on this bright night, I can picture the stone walls of my Ecuadorian home splitting open.

Permafrost collapse

In Titanatemnus gigas it is almost like a spoon; in Oratemnus punctatus and Cyclatemnus centralis it has the same shape but is bowed concavely (Figs.

The male genitalia of the family Atemnidae (Pseudoscorpiones)

The function [[beta].sub.e] increases concavely toward a maximum [[beta].sub.e] = 1/3 when [alpha] = 0.5 and decreases symmetrically around [alpha] = 0.5.

Mutual raiding of production and the emergence of exchange

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