Topographical distance

T D T/D Topographic distance/topological distance quotient matrix ... 

T A taA Topographic distance-detom distance combined matrbc... 

In the same way, the reciprocal topographic matrix, denoted as T, is defined in terms of the reciprocal of topographic distances instead of the reciprocal of geometric distances. 

Important derived matrices are the powers of the geometry matrix, used to define —> molecular profiles descriptors. Moreover, distance/distance matrices, denoted as D/D, were defined as quotient matrices in terms of geometric r or topographic distances ty and —>... 

The topological distance/geometric distance quotient matrix, denoted by D/G, is the reciprocal matrix of the G/D matrix, and the topological distance/topographic distance quotient matrix, denoted by D/T, the reciprocal matrix of the T/D matrix. 

We consider here two kinds of distance/distance matrices the topographic distance/topological distance matrix and the corresponding reciprocal matrix. We denote the first matrix as D/ D and the second as D/ D. 

The topographic distance/topological distance matrix is an unsymmetric VxV matrix, in which the upper matrix-triangle represents the same part of the corresponding topographic matrix, and the lower matrix-triangle the same part of vertex-distance matrix (defined in Section 4.1) ... 

The topographic distance/topological distance matrix D/D of T2 is given by... 

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