NETMaths

Is this true?

Zeros of a non-constant holomorphic function cannot accumulate

No — it is false.

The counterexample

sin(1/z) on ∖{0}

Zeros accumulate at 0, which lies outside the domain. Inside the domain zeros are always isolated.

The kind of mistake this is

Standard counterexample

There is a canonical object that settles this. Recognising it is the whole question.

Drill statements like this

Others that fail the same way

From Analytic FunctionsPower series and analyticity

ShareWhatsAppTelegram