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  • Shallow[ expr ] prints as a shallow form of expr.
  • Shallow[ expr , depth ] prints with all parts of expr below the specified depth given in skeleton form.
  • Shallow[ expr , depth , length ] also gives parts whose lengths are above the specified limit in skeleton form.
  • Shallow[ expr , depth , length , form ] uses skeleton form for any parts which match the pattern form.
  • Omitted sequences of elements are given as Skeleton objects, which print in the form k.
  • In StandardForm, the characters used for this output are \[LeftSkeleton] and \[RightSkeleton].
  • Depth and length can be specified as Infinity.
  • Shallow[ expr ] is equivalent to Shallow[ expr , 4, 10 ].
  • Shallow acts as a "wrapper", which affects printing, but not evaluation.
  • Trying to feed k as obtained from Shallow back as input to Mathematica in StandardForm will generate an error.
  • See the Mathematica book: Section 2.8.5.
  • See also: Short.

    Further Examples

    It is often convenient to display only part of a very long expression.