人们从直观上观察到空间三维(或三度)和一维时间,相对论称为“四维时空”。对于超四维空间人们一直是处于支持和反对的态度。有人认为宏观世界空间是三维的;微观世界空间是三维空心球体,也可称微观世界空间是三维的,时间是四维的,时空总计十维。
一假想存在于十维空间中的粒子,由一根短的一维纤维组成。这是一种时空混合超对称性理论中的基本粒子。
A hypothetical particle consisting of a very short one-dimensional string existing in ten dimensions. It is the elementary particle in a theory of space-time incorporating supersymmetry.
这一区别引领了数十年的数学和物理学领域的研究,包括1984年由西蒙·唐纳森发现的伪四维空间。
The dichotomy has led to decades of research in mathematics and physics, including the discovery of "fake" four-dimensional Spaces by Simon Donaldson in 1984.
堤坝下游减压井列的渗流计算,是一个十分复杂的三维空间流动问题。
It is well known that, the seepage flow problem of the partially penetrating relief well is complex.
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