42 questions linked to/from Do complex numbers really exist?
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### Is it ever $i$ time?

I am asking this question as a response to reading two different questions: Is it ever Pi time? and Are complex number real? So I ask, is it ever $i$ time? Could we arbitrarily define time as ...
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### Regarding uses of $i$ (square root of $-1$) [duplicate]

Are there any uses of 'square root of $-1$' in practical life ; like in Physics ?