Patent ID: 7219117

Claim:
A system for computing an output interval comprising: a component for producing a first product resulting from a conditional multiplication using a first operand, a second operand, and a third operand, the operands respectively including a first input interval lower-point, a second input interval lower-point, and a second input interval upper-point; a component for producing a second product resulting from the conditional multiplication using the first operand, the second operand, and the third operand, the operands respectively including a first input interval upper-point, the second input interval lower-point, and the second input interval upper-point; a component for producing a third product resulting from the conditional multiplication using the first operand, the second operand, and the third operand, the operands respectively including the first input interval lower-point, the second input interval upper-point, and the second input interval lower-point; a component for producing a fourth product resulting from the conditional multiplication using the first operand, the second operand, and the third operand, the operands respectively including the first input interval upper-point, the second input interval upper-point, and the second input interval lower-point; and a component for producing the output interval including an output interval lower-point and an output interval upper-point, the output interval lower-point being the minimum of the first product and the third product, and the output interval upper-point being the maximum of the second product and the fourth product.