Concave

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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.
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The overall investment in attack increases concavely in the firm's unit defense cost, decreases convexly in the hackers' unit cost of attack, and increases linearly in the firm's asset.
The sanitary napkin includes a napkin body having a liquid-absorbent layer for absorbing and retaining liquid; and first and second projections each exerting an clastic contractive force between longitudinally opposing front and rear ends to concavely curve the body surface of the napkin body and raise itself from the body surface of the napkin body.
The General Assembly building, the UN's best known meeting hall and a visually distinct building in the compound with its concavely arching roofline, will be redone starting in 2012 and will use the temporary conference facility for meetings while the work is being conducted.
In general, risk aversion means that (cardinal) utility is concavely increasing in monetary gains' CRRA relies on U([PI]) = [[PI].
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.
This outcrop strikes N about 70[degrees] W, dipping 50[degrees] NE at its higher part, had the beds falling concavely until they became almost horizontal before they disappear under the water of the river.