Engineering Optimization: Theory and Practice, Fourth Edition

780 Convex and Concave Functions

Figure A.1 Functions of one variable:(a)convex function in one variable;(b)concave function

in one variable.

Figure A.2 Functions of two variables:(a)convex function in two variables;(b)concave

function in two variables.

Figure A.3 Function that is convex over certain region and concave over certain other region.