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1)  angle cone
π性质锥
1.
It is proved that the Pareto optimal point exists on any weak bounded closed set in an ordered locally convex space with the closed cone with π property and on any bounded closed set in an ordered complete locally convex space with the closed angle cone or closed cone with π property.
证明了带有π性质锥的序局部凸线性拓扑空间中的每一个有界弱闭集和带有π性质锥或角性质锥的序局部凸完备拓扑线性空间中的每一有界闭集存在Pareto-optimal点。
2)  π/2-property
π/2性质
1.
In this paper,it is proved that a Minkowski plane with π/2-property,whose unit circle is Radon curve,is an inner product space.
证明了单位圆是Radon曲线,且具有π/2性质的M inkowski平面,是内积空间。
2.
In this paper, the spaces which are weaker than euclidean spaces have π/2-property is proved, calculates an equivalent representation of nonsquare constants of this spaces and the characteristics of the point in the unit sphere when nonsquare constants equals 2~(1/2).
证明了一类比欧氏空间弱的空间具有π/2性质,计算出这种空间的非方常数的等价表示以及非方常数等于2~(1/2)时,单位球面S(X)上点的特点。
3)  approximation/π property
逼近/π性质
4)  cone property
锥性质
1.
In 1988 using the cone property theorem Temam R and Foias C proved the existence of inertial manifolds for a kind of dissipative systems.
1988年TemamR和FoiasC利用所谓锥性质定理证实了一类耗散系统存在惯性流形,本文修改了起关键作用的锥性质定理,从而改进了惯性流形存在性定理中的条件系
5)  invariant cone property
不变锥性质
6)  space with π/2-Property
具有π/2性质的空间
补充资料:π, π-conjugation
分子式:
CAS号:

性质:单键和双键相互交替排列的共轭体系。最简单的为1,3-丁二烯,而苯分子则是一个具有高度对称结构的闭合共轭体系。除碳碳双键外,碳碳叁键、碳氧双键等,都可组成π,π-共轭。例如:CH2=CH—C≡CH;CH2=CH—CH=O。由π,π-共轭引起的使分子内能降低、键长发生平均化等电子效应,称为π,π-共轭效应。

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