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Real Intervals
Compute properties for one real interval or compare multiple intervals.
Compute properties of an interval of real numbers:
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Knot Theory
Find and visualize knots, either by specifying a common name or using knot notation.
Compute properties of a knot:
Specify a knot using Alexander–Briggs notation:
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Homotopy Groups of Spheres
Compute the homotopy groups of an n-sphere.
Compute homotopy groups of a sphere:
Compute a specified homotopy group:
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