Logic Package Operators
The Logic package uses a two-valued logic system, while standard Maple logic is three-valued. For this reason, all Boolean expressions used in the Logic package must be expressed in terms of the operators &and, &iff, &implies, &nand, &nor, ¬, &or, and &xor.
You may either enter expressions in terms of these operators directly into Maple, or transform expressions of type logical into expressions in terms of these operators with the Logic[Import] command.
Note that the Logic package operators do not have the same precedence as corresponding three-valued operators. In particular, all operators have the same precedence, so a⁢&or⁢b⁢&and⁢c is equivalent to a&orb&andc, not a&orb&andc. Parentheses should be used to correctly specify the precedence.
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