Bo Åhlander
= Bo Åhlander
{c}
Bo Åhlander coauthored a study of the <arithmetic derivative> with <Victor Ufnarovski>. The operation is determined on positive integers by assigning one to each <prime number> and imposing the <product rule>. Thus the derivative of $6=2\cdot3$ is $3+2=5$, illustrating an arithmetic analogue of differentiation built from <integer factorization>.<How to Differentiate a Number by Victor Ufnarovski and Bo Åhlander>[Section 1, Theorem 1]{ref}