• Share[expr] changes the way expr is stored internally, to try and minimize the amount of memory used.
• Share[ ] tries to minimize the memory used to store all expressions.
• Share works by sharing the storage of common subexpressions between different parts of an expression, or different expressions.
• Using Share will never affect the results you get from Mathematica. It may, however, reduce the amount of memory used, and in many cases also the amount of time taken.
• New in Version 1.