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Hinge -- from Wolfram MathWorld
Brace -- from Wolfram MathWorld
The Modular Group « The Mathematica Journal
Braced Polygon -- from Wolfram MathWorld
This is to be answered using wolfram mathematica. If
Frontiers Panoramic Uncertainty in Vertical Perception
WolframAlpha Full Results API Reference
Number - Wikipedia
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Abstract Algebra for Secondary Mathematics Teachers
Hinge -- from Wolfram MathWorld
What is the output of the integer floor function for the input
Diagonal - Wikipedia
Frontiers Panoramic Uncertainty in Vertical Perception