Satisfiability Problem - Theory, Applns. [math] by D. Du, et. al., PDF

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By D. Du, et. al.,

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What's wrong? Are you sick? Say something! " Professor Douglas jerked free and pulled open the front door. He stepped out onto the porch. There was a faint moon. A soft light hovered over everything. " The voice again, sweet and fresh -- a girl's voice. Outlined by the moonlight, at the foot of the porch steps, stood a girl. Blonde-haired, perhaps twenty years old. In a checkered skirt, pale Angora sweater, a silk kerchief around her neck. She was waving at him anxiously, her small face pleading.

A great shape, so huge it staggered him. The shape moved, a disembodied circle of living presence, directly over his head. A face. A gigantic, cosmic face peering down. Like some great moon, blotting out everything else. The face hung for an instant, intent on him -- on the spot he had just vacated. Then the face, like the ingot, faded and sank into darkness. The stars returned. He was alone. Douglas sank back against the seat. The car veered crazily and roared down the highway. His hands slid from the wheel and dropped at his sides.

Loyce relaxed a little. He studied the people around him. Dulled, tired faces. People going home from work. Quite ordinary faces. None of them paid any attention to him. All sat quietly, sunk down in their seats, jiggling with the motion of the bus. The man sitting next to him unfolded a newspaper. He began to read the sports section, his lips moving. An ordinary man. Blue suit. Tie. A businessman, or a salesman. On his way home to his wife and family. Across the aisle a young woman, perhaps twenty.

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Satisfiability Problem - Theory, Applns. [math] by D. Du, et. al.,

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