Parabiaugmented Dodecahedron
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Johnson Solid 
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- Hyperspace
- Hypersphere
- Hypersphere Packing
- Hypervolume
- Hypocycloid
- Hypocycloid--3-Cusped
- Hypocycloid--4-Cusped
- Hypocycloid Evolute
- Hypocycloid Involute
- Hypocycloid Pedal Curve
- Hypoellipse
- Hypotenuse
- Hypothesis
- Hypothesis Testing
- Hypotrochoid
- Hypotrochoid Evolute
- Hyzer's Illusion
- Hénon Attractor
- Hénon-Heiles Equation
- Hénon Map
- Hölder Condition
- Hölder Integral Inequality
- Hölder Sum Inequality
- i
- I