• Expansion of Numbers and Operations
ᐥ+addition (−subtraction) ↺ ·multiplication (/division) ↺ ˄exponentiation (˅root ⍻logarithm)ᐥ
➊ Addition
The natural numbers are closed under addition.
➋ Subtraction is the inverse operation of addition.
l + m = n
n - m = l
Define 0 and negative integer ...
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