Numbers

1. Number Theory

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1.1. Complex Number

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[2025-05-22 Thu 19:46] – wiki

1.2. Quaternion

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[2025-05-18 Sun 17:16] – wiki 

a + bi + cj + dk

where coeffs a b c d are reals and 1,i,j,k are basis vectors or bassis elements.

1.3. Cayley-Dickson construction

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[2025-05-22 Thu 19:43] – wiki

1.4. Prime Number

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[2025-05-22 Thu 19:48] – wiki

1.4.1. Mersenne Prime

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[2025-05-22 Thu 19:51] – wiki

1.5. Perfect Number

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[2025-05-22 Thu 19:49] – wiki

1.5.1. Hyperperfect Number

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[2025-05-22 Thu 19:50] – wiki

2. Combinatorics

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[2025-05-27 Tue 20:13] – wiki