topology
US /təˈpɑː.lə.dʒi/
UK /təˈpɑː.lə.dʒi/

1.
the study of the properties of geometric objects that are preserved under continuous deformations, such as stretching, twisting, crumpling, and bending, but not tearing or gluing
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In mathematics, topology is a broad and fundamental area.
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Knot theory is a branch of topology.
2.
the way in which constituent parts are interrelated or arranged
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The network topology affects its performance.
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The building's internal topology was complex and confusing.