Info : T is actually a triangulation -list of triangles-, in which each index corresponding to the row index of a vertex in another list -a vertices list-, it is a widely used technique used to store and write triangular meshes in mesh processing. Here below the example is a tetrahedron -4 facets-.
Make a checkerboard matrix
Determine if a Given Number is a Triangle Number
Back to basics 23 - Triangular matrix
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Remove duplicated vertices
Find triangles from edge
Query a vertex neighbors
Query edges list
Find neighbor triangle indices
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