Metric (Mathematics): space, Pseudometric Mathematics, Function (mathematics), Distance, Set Topology, Topological ... geometry, Vector tensor

Chebyshev Distance: Mathematics, Metric (mathematics), Vector Space

Neighbourhood (mathematics): (mathematics), Topology, Mathematics, Topological Space, Open Set, Interior (topology)

Triangulation (Topology): (Advanced Geometry), Topology, Mathematics, Topological Space

Topological Vector Space: Mathematics, Topology, Function (Mathematics), Functional Analysis, Algebra, Ring, Banach...