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| a positive integer that is not divisible without remainder by any integer except itself and 1, with 1 often excluded |
| the result of division; the number of times one quantity is contained in another |
homotopy
in mathematics, a way of classifying geometric regions by studying the different types of paths that can be drawn in the region. Two paths with common endpoints are called homotopic if one can be continuously deformed into the other leaving the end points fixed and remaining within its defined region. In part A of the , the shaded region has a hole in it; f and g are homotopic paths, but g' is not homotopic to f or g since g' cannot be deformed into f or g without passing through the hole and leaving the region
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