Advice: sqrt(-1) is I
In Maple input, I is used for . This is an alias, rather than an assigned value. You can remove the alias if you wish:
And if you prefer, you can use i or j instead.
This practice is slightly dangerous, as you may run into some Maple code that uses I for sqrt(-1) (probably not in Maple itself, but it could happen in something written by others).
See also: I , alias
Maple Advisor Database R. Israel, 1997