It is found that the gauged supergravity theories in d=7 compactify on Ad S*S 3 or Ad S*H 3 (3-hyperboloid), while the ungauged Maxwell-Einstein supergravity in d=7 compactifies on (Minkowski) 4 *Tear Drop*S 1 . The novel feature in these compactifications is the appearance of non-compact Einstein internal spaces. The possibility of their leading to non-compact gaugings in d=4 is suggested.
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M. Pernici (1985) studied this question.
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