Youngs worked in geometric topology, for example, questions on the Frechét-equivalence of topological maps.

They faxed me a topological map of the base you burglarized, and a floor plan of the lab.

First he creates an abstract topological map of the existing site.

Here, the probability of finding electrons was mapped for the structure on a chart that resembled a topological map.

The procedure included a 'diseño' - a hand-drawn topological map - to define the area.

A portion of the display screen wiped clear, replaced by a window showing a three-dimensional topological map of the immediate Celeste area.

Some maps, for example the London Underground map, are topological maps.

A topological map is a very general type of map, the kind you might sketch on a napkin.

A transit map is a topological map or schematic diagram used to show the routes and stations in a public transport system.

It was immediately popular, and the Underground has used topological maps to illustrate the network ever since.