StringTake (Built-in Mathematica Symbol)

StringTake["string", n] gives a string containing the first n characters in " string". StringTake["string", -n] gives the last n characters in " string". StringTake["string", ...

Subtract (Built-in Mathematica Symbol)

x - y is equivalent to x + (-1*y).

ToLowerCase (Built-in Mathematica Symbol)

ToLowerCase[string] yields a string in which all letters have been converted to lowercase.

Times (Built-in Mathematica Symbol)

x*y*z, x*y*z, or x y z represents a product of terms.

Use Derivatives for Setting Up ... (Mathematica How To)

Mathematica 's functions for solving differential equations can be applied to many different classes of differential equations, including ordinary differential equations ...

Expressions as Trees (Mathematica Tutorial)

Here is an expression in full form. TreeForm prints out expressions to show their "tree" structure. You can think of any Mathematica expression as a tree. In the expression ...

Map a Function over a List (Mathematica How To)

Mathematica includes many powerful operations for working with lists. It is often desirable to map a function onto each individual element in a list. While listable functions ...

EdgeStyle (Built-in Mathematica Symbol)

EdgeStyle is an option and property for Graph and related functions that specifies what style to use for edges.

TagSet (Built-in Mathematica Symbol)

f /: lhs = rhs assigns rhs to be the value of lhs, and associates the assignment with the symbol f.

Advice and Suggested Guidelines (Notation Package Tutorial)

The following are some issues and considerations to be aware of when using the Notation Package and/or designing notations. It is intrinsically difficult to debug something ...