ComplexityFunction is an option for Simplify and other functions which gives a function to rank the complexity of different forms of an expression.

ConversionRules is an option for Cell that can be set to a list of rules specifying how the contents of the cell are to be converted to external formats.

HoldComplete[expr] shields expr completely from the standard Mathematica evaluation process, preventing even upvalues associated with expr from being used.

Names["string"] gives a list of the names of symbols which match the string. Names[patt] gives a list of names matching the arbitrary string pattern patt.

PrimeOmega[n] gives the number of prime factors counting multiplicities \[CapitalOmega](n) in n.

Making lists from functions. This makes a list of 5 elements, each of the form p[i]. Here is another way to produce the same list.

BoxesToSymbolicMathML[boxes] converts the Mathematica box structure, boxes, into a MathML-flavored SymbolicXML structure.

Using the objects described in "Introduction to Patterns", you can set up patterns for many kinds of expressions. In all cases, you must remember that the patterns must ...

Definitions such as f[x_]=x^2 specify values for functions. Sometimes, however, you need to specify general properties of functions, without necessarily giving explicit ...

SymbolicC supports working with C functions, as described in this section. First, you need to load the package. Now, you can create a C function with CFunction.