Definition of "topological" [topological]

• Of or relating to topology (adjective)

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• "His first hypothesis was / is that the mind is made up of strata, rather like an archaeological site - this we call his topological model - First we have the surface layer called the conscious, the next the preconscious and the third and deepest the unconscious."
• "This projection of a punctured sphere S2 on the Euclidean E2 is not only topological, that is bi-continuous, but also con - formal, that is angle-preserving; and this was already known to the astronomer and geographer Ptolemy in the second century A.D. in his Geography (M.R. Cohen and I.E. Drabkin, pp. 169-79)."
• "The work by the Princeton team is part of an ongoing inquiry into materials called topological insulators -- substances that act as insulators in their interior while permitting the movement of charges on their boundary."