There is a complete classification of dimetric phenomenologically symmetric geometries of two sets (DPS GTS’s) of rank (n +1, 2), n = 1, 2, …. One can see from this classification that some geometries include geometries of the preceding rank. Such an embedding can be established (or disproved) by solving the corresponding functional equation that express the fact of embedding of geometries in terms of the defining metric functions.

中文翻译：

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两组几何的对称对称几何的秩（n + 1，2）的连续嵌入

两组（n +1，2），n = 1，2，…的集合（DPS GTS's）的对称对称的对称几何完全分类。从该分类中可以看出，某些几何形状包括先前等级的几何形状。可以通过求解相应的函数方程来建立（或取消证明）这种嵌入，该函数方程根据定义的度量函数来表达几何的嵌入事实。