This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.

# Map (/@)

 Map[f, expr] or f/@exprapplies f to each element on the first level in expr. Map[f, expr, levelspec]applies f to parts of expr specified by levelspec.
• Map uses standard level specifications:
 n levels 1 through n Infinity levels 1 through Infinity {n} level n only {n1,n2} levels n1 through n2
• The default value for levelspec in Map is {1}.
• A positive level n consists of all parts of expr specified by n indices.
• A negative level -n consists of all parts of expr with depth n.
• Level -1 consists of numbers, symbols and other objects that do not have subparts.
• Level 0 corresponds to the whole expression.
• With the option setting , Map includes heads of expressions, and their parts.
• Map always effectively constructs a complete new expression, and then evaluates it.
• If expr is a SparseArray object, Map[f, expr] applies f to the values or subarrays that appear in expr.
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