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set_of_divisors_function [2014/03/21 11:11] 127.0.0.1 external edit |
set_of_divisors_function [2016/05/24 19:19] nikolaj |
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| | @#FFBB00: definiendum | @#FFBB00: $ \mathrm{divisors}:\mathbb N^+\to\mathcal{P}(\mathbb N) $ | | | @#FFBB00: definiendum | @#FFBB00: $ \mathrm{divisors}:\mathbb N^+\to\mathcal{P}(\mathbb N) $ | | ||
| | @#FFBB00: definiendum | @#FFBB00: $ \mathrm{divisors}(n):=\{a\ |\ \exists (b\in\mathbb N).\ a\cdot b=n\} $ | | | @#FFBB00: definiendum | @#FFBB00: $ \mathrm{divisors}(n):=\{a\ |\ \exists (b\in\mathbb N).\ a\cdot b=n\} $ | | ||
| + | |||
| + | >make this into a set | ||
| ==== Discussion ==== | ==== Discussion ==== | ||
| Line 9: | Line 11: | ||
| A related Boolean function is | A related Boolean function is | ||
| <code haskell> | <code haskell> | ||
| - | divides :: Integer -> Integer -> Bool | + | divides :: Integral a => a -> a -> Bool |
| divides d n = rem n d == 0 | divides d n = rem n d == 0 | ||
| </code> | </code> | ||
