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From: Jussi Piitulainen <jussi.piitulainen@helsinki.fi>
Newsgroups: comp.lang.python
Subject: Re: Suggestion: make sequence and map interfaces more similar
Date: Wed, 30 Mar 2016 13:28:57 +0300
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Steven D'Aprano writes:

> On Wed, 30 Mar 2016 06:12 pm, Jussi Piitulainen wrote:
>
>> Steven D'Aprano writes:
>> 
>>> Given a surjection (many-to-one mapping)
>> 
>> No. And I doubt that Wikipedia says that.
>
> No to what? What are you disagreeing with?

Surjection does not mean many-to-one mapping. It means something else.