DirectedInfinity (Built-in Mathematica Symbol)

DirectedInfinity[] represents an infinite numerical quantity whose direction in the complex plane is unknown. DirectedInfinity[z] represents an infinite numerical quantity ...

Information (Built-in Mathematica Symbol)

Information[symbol] prints information about a symbol.

Indeterminate and Infinite Results (Mathematica Tutorial)

If you type in an expression like 0/0, Mathematica prints a message, and returns the result Indeterminate. An expression like 0/0 is an example of an indeterminate numerical ...

SparseArray (Built-in Mathematica Symbol)

SparseArray[{pos_1 -> val_1, pos_2 -> val_2, ...}] yields a sparse array in which values val_i appear at positions pos_i. SparseArray[{pos_1, pos_2, ...} -> {val_1, val_2, ...

Tables and Matrices (Mathematica Tutorial)

Formatting lists as tables and matrices. Here is a list. Grid gives the list typeset in a tabular format.

I (Built-in Mathematica Symbol)

I represents the imaginary unit Sqrt[-1].

Set (Built-in Mathematica Symbol)

lhs = rhs evaluates rhs and assigns the result to be the value of lhs. From then on, lhs is replaced by rhs whenever it appears. {l_1, l_2, ...} = {r_1, r_2, ...} evaluates ...

ComplexInfinity (Built-in Mathematica Symbol)

ComplexInfinity represents a quantity with infinite magnitude, but undetermined complex phase.

StringReplace (Built-in Mathematica Symbol)

StringReplace["string", s -> sp] or StringReplace["string", {s_1 -> sp_1, s_2 -> sp_2, ...}] replaces the string expressions s_i by sp_i whenever they appear as substrings of ...

Applying Functions to Parts of ... (Mathematica Tutorial)

If you have a list of elements, it is often important to be able to apply a function separately to each of the elements. You can do this in Mathematica using Map. This ...