Classification of primitive Pythagorean triples

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Parabolic patterns in the scatter plot of Pythagorean triples

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Classification of Pythagorean triples and reflection on Fermat’s last theorem

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N-complex number, N-dimensional polar coordinate and 4D Klein bottle with 4-complex number

 

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PengKuan’s work On Mathematics

 

Is Hilbert's Grand Hotel a paradox?

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Determination of the relative roll, pitch and yaw between arbitrary objects using 3D complex number

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