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Infix Operators

Note that ``x'' indicates that the indicated subtree must have, as its root, an operator of lower precedence than that of the root.

The ``y'' indicates that the root of the subtree may have the same precedence as the operator that is the root of the tree.

The ``f'' indicates the operator itself.

Paul Brna
Mon May 24 20:14:48 BST 1999