Talk:Identity function
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I changed back to the previous version for the following reasons:
- The identity function is in general not multiplicative. Only in the special case of M = positive integers could it be called a multiplicative function. But there are many other sets M out there.
- We don't use colors in formulas
- Blackboard bold is reserved for sets of numbers, like R or C. Letters that stand for functions, sets or variables are normally written in italic.
AxelBoldt, Thursday, April 18, 2002