# lemma for imaginary quadratic fields

## Primary tabs

Type of Math Object:
Theorem
Major Section:
Reference
Groups audience:

## Mathematics Subject Classification

11R11 no label found11R04 no label found

## Comments

### squarefree?

does d have to be squarefree in this lemma?

### Re: squarefree?

V\"ais\"al\"a's proof is quite long, and partly rests on former theorems where one usually supposes the squarefreeness. Of course, one never needs to think that when speaking of quadratic field Q(\sqrt{d}), d were other than square-free.
Regards,
Jussi