Convex function on an open set has no more than one minimum. In demand it shows the elasticity is linear after some point and non linear on other points.
I have never heard that the demand curve must be concave. In fact, it is most often modeled as either linear or convex. Common convex specifications include log-linear and constant-elasticity demand functions. A number of empirical papers attempt to estimate the shape of the demand curve for specific products but I am not familiar with anyone concluding that demand is concave generally.
The opposite of convex is concave. Concave shapes have an inward curve, while convex shapes have an outward curve.
Convex lenses protrude or curve out, concave lenses curve in, like a cave...
Convex lens curve outwards.
Convex lenses makes an object appear larger and closer. They curve inwards toward the center.
It is false that the steeper the demand curve the less elastic the demand curve. The steeper line is used in economics to indicate the inelastic demand curve.
Concave shapes curve inward, like a cave, while convex shapes curve outward, like a bump.
Convex shapes curve outward, like a dome, while concave shapes curve inward, like a cave.
The data on a demand schedule can be plotted on a demand curve. Often, a demand schedule will be created before the creation of a demand curve, so as to allow for greater accuracy when plotting the demand curve.
The two types of curved mirrors are concave and convex mirrors. Concave mirrors curve inward and can create both real and virtual images, while convex mirrors curve outward and only produce virtual images.
A concave polygon has lines that curve inwards whereas a convex polygon has lines that curve outwards and they are found on and inside spheres
An open curve, perhaps.