MNDO calculations and group theory were carried out on tetraphenyl porphyrine(TPP) to obtain its optimum molecular geometry.
运用MNDO计算和群论,优化较满
的中
四苯基卟啉(H2TPP)的分子构型。
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In the 1970s, mathematician John McKay was making a switch to studying group theory to an adjacent field, and he noticed that a number very similar to this 196,883 showed up in a completely unrelated context, or at least, almost.
20 世纪 70 年代, 数学家约翰·麦凯 (John McKay) 而研究邻近领域的群论,他注意到一个与 196,883 非常相似的数字出现在完全不相关的背景中,或者至少
几乎不相关的背景中。