里奇张量指当球面围绕着物体(此处为星球)时,就有一个纯粹向内的加速。这类似对称的向心力,是类似球面庞加莱猜想的整体的收缩或扩张
里奇张量指当球面围绕着物体(此处为星球)时,就有一个纯粹向内的加速。这类似对称的向心力,是类似球面庞加莱猜想的整体的收缩或扩张
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