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-.
Whether the input is vector?
Create matrix of replicated elements
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
Vector indexing: lower than mean
Query every vertices neighbor indices
Find a common vertex
Find neighbor triangle indices
Remove duplicated triangles
Find edges from a vertex
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