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Extending the arithmetic derivative to negative numbers | number theory | advanced level
Episode 105.
Extending the arithmetic derivative to negative numbers | number theory | advanced level.
Branch of mathematics: number theory.
Difficulty level: advanced.
The arithmetic derivative is a function $D$ from natural numbers to natural numbers defined by the 2 properties:
1. For any prime number $p$, we have $D(p)=1$.
2. For any 2 natural numbers $m$ and $n$, we have $D(m \cdot n) = D(m) \cdot n + m \cdot D(n)$.
It can be proved that $D(1)=0$.
It can be extended to all integer numbers (to negative numbers and zero) like this: $D(0)=0$ and $D(-n)=-D(n)$ for any natural number $n$.
Mathematics. Number theory.
#Mathematics #NumberTheory
The same video on YouTube:
https://youtu.be/RDZzw4XnnY4
The same video on Telegram:
https://t.me/mathematical_bunker/130
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