TRIPLET AND QUARTET RELATIONSHIPS AND THE POSITIVITY POSTULATE
A.AltomareC.Giacovazzo1A.Guagliardi1D.Siliqi2
1. Dipartimento Geomineralogico,Universita'di Bari,70124 Bari,Italy2. Department of Inorganic Chemistry,University of Tirana,Tirana,Albania
摘要：<正>Positivity and atomicity are traditionally considered as basic conditions for direct methods.The origin of this belief traces back to the early theory of inequalities.Latter on it was perceived that positivity is not an essential ingredient of direct methods,however
会议名称：
Sixteenth Congress of the International Union of Crystallography
会议时间：
1993-08-21
会议地点：
中国北京
- 专辑：
工程科技Ⅰ辑
- 专题：
化学
- 分类号：
O7
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