C-K theory was shown by Hatchuel and Weil which are both based on topological structures for design modeling.
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The variability of sources and destinations in this model has a drastic effect on the topological structure underlying the solution.
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These sets can be given a natural topological structure : the Zariski Riemann space of " K / k ".
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To define a closeness relation between two sets the topological structure is too weak and we have to use a uniform structure.
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Examples are homomorphisms, which preserve algebraic structures; homeomorphisms, which preserve topological structures; and diffeomorphisms, which preserve differential structures.
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This topology can be derived from the Vietoris topology construction, a topological structure on all non-empty subsets of a space.
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The final equivalent condition shows that the class of sequential spaces consists precisely of those spaces whose topological structure is determined by convergent sequences in the space.
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In the generalized transportation problem the topological structure of the evolving iterative solution is a set of disconnected loops each with attached branched sidechains ( trees ).
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The conceptual difference between uniform and topological structures is that, in a uniform space, one can formalize certain notions of relative closeness and closeness of points.
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Infinite products are also defined by the topological structure; it can be seen that an infinite product converges if and only if the sequence of its factors converges to 1.