LandmarkSelection

landmarks(i) is the ambient index of the i-th landmark -- the mapping every witness-stream class below needs to translate its own LOCAL 0 until landmarks.size simplex vertex indices back to the caller's original point cloud (matlab.TDA4j does this for cycleVertices). coveringRadius is R = max_x min_l d(x,l). insertionRadius maps an ambient index to its own greedy-permutation lambda (see maxmin's doc); empty for random (no meaningful lambda) and for a hand-built selection not routed through maxmin.