List
 Usage
• { ,  , ... } is a list of elements.
Notes
• Lists are very general objects that represent collections of expressions. • Functions with attribute Listable are automatically "threaded" over lists, so that they act separately on each list element. Most built-in mathematical functions are Listable. • {a, b, c} represents a vector. • {{a, b}, {c, d}} represents a matrix. • Nested lists can be used to represent tensors. • New in Version 1.
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