Documentation/Notation

Notation

As a math parser is currently not used, we write the math equations as formated text:

• Scalars are written as small italic letters, e.g. f
• Vectors are written as small bold letters, e.g. x.
• Matrices are written in capital bold letters, e.g. C.

Symbols

f, f	objective function(s)
x, x	design variable(s)
g, g	constraint(s)

Terminology

solution	The term solution is used in optimization. One solution (x,f,g,a) consists of a vector of design variables x, the evaluated objective(s) f(x), constraint(s) g(x), and optionally of additional values a.
design variables	The vector of design variables x may consist of real numbers (continuous variables), integers (discrete variables) or both (mixed variables).
objectives	An optimization problem must have at least one objective or one constraint. OpenDino requires that the objective(s) f is/are to be minimized. A maximization of a function k can be converted into minimization by using f = -k.
constraints	Constraints c are criteria that have to be fulfilled. OpenDino defines a constraint c as fulfilled, if c =< 0 violated, if c > 0. The most simple constraint handling in optimization is to add a penalty to the objective function if the constraint is vialoted, resulting in f + max(0, c).