The existence of a natural and projectively equivariant quantization in the sense of Lecomte [20] was proved recently by M. Bordemann [4], using the framework of Thomas-Whitehead connections. We give a new proof of existence using the notion of Cartan projective connections and we obtain an explicit formula in terms of these connections. Our method yields the existence of a projectively equivar...

Michael Drosnin has written a frightening book. Nuclear holocausts, calamitous earthquakes, the Nazi death camps, terrorist bombings, assassinations of world leaders who may have held some hope for humanity—a 182-page catalogue of very real threats to our world. The Bible Code purports the existence of a hidden code in the Hebrew text of the Old Testament. This code, according to Drosnin, conta...

Two-dimensional displays were used to investigate the perception of object unity in 48 2-monthold and 48 4-month-old infants. The infants were habituated to a computer-generated display depicting a rod in motion behind a box. Posthabituation test trials consisted of two rod pieces (broken rod) and a complete rod, presented three times each in alternation. The 4-month-olds looked longer at the b...

Many readers will recall a provocative Oliphant cartoon, which was circulated nationally and seen on the editorial pages of our newspapers during the 1976 Patricia Hearst trial. It caricatures the essence of our plight. Consider again its portrayal of a white-bearded defense psychiatrist gliding into the courtroom balanced precariously on roller skates; with a propellered beanie on his head, a ...