Consider a functional, what is meant by a minimal sequence consistent of 'piecewise affine functions'?
What is an affine function?
1
$\begingroup$
pde
functional-equations
-
2$f$ is *affine* function, if $x\mapsto f(x)-f(0)$ is linear. – 2012-11-02
-
0Could you give some context? – 2012-11-02
-
0I want to show that an minimum of an energy-functional does not exist. – 2012-11-02
-
0Is arctan an affine function? – 2012-11-02
-
0@AlexisZorbas Affine functions are those of the form $f(x)=ax+b$ for some constants $a$ and $b$. Of course, $\arctan$ is not of that form. – 2015-06-12