Talk:Function (mathematics)

I like to know if it is consider non-simplicity if we use symbol like

f\colon X\to Y

to speak about a function (f between the sets X, Y), here in the simple english zone. Can anyone can help me? --kidd 06:46, 31 December 2006 (UTC)[reply]

I think it's simple. It is not a complex English word. Also, it's simple to explain. I just replied to something written in 2006. πr² (t • c) 01:20, 11 November 2011 (UTC)[reply]

I also think it is simple but I would just like to check once more...Who do you think is the target audience for this article? Selfstudier (talk) 14:36, 3 April 2012 (UTC)[reply]

The target audience for all our articles are people who can't speak English well such as those who it is a second language for, people with learning disabilities and children. -DJSasso (talk) 19:23, 4 April 2012 (UTC)[reply]

OK, I will try (three audiences are a lot different?). For mathematics,it is hard to make the article very simple. For example, f:X to Y above, they say it is simple, do you agree?Selfstudier (talk) 19:54, 4 April 2012 (UTC)[reply]

Well really the one you should shoot for is the ESL people since they are probably our majority. Basically the goal is to make it as simple as possible. Some things will always be a little complex. -DJSasso (talk) 20:02, 4 April 2012 (UTC)[reply]

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I think we are talking about a crowd who does not speak a (natural) language well. Mathematics has its own language, which is pretty universal, probably; the symbols used (uppercase, bold letters for sets) are probably agreed upon too. Big question: would someone in Thailand, or Japan use the same basic symbols, even though they use a different alphabet? - I think the gist is to explain well, not to not use the common symbols/language of mathematics. --Eptalon (talk) 20:22, 4 April 2012 (UTC)[reply]

Codomain?[change source]

Can a mathematician help out? We've been studying the Y-output as "Range", not "Codomain". I didn't go ahead and change it because I didn't want to cause some edit war. Anyways, restating it, our Alg class describes what simple.wikipedia calls "Codomain", "Range". Is it different for some Algebra classes? Is it a regional/country thing? Thanks, --Atcovi (talk) 14:00, 10 December 2016 (UTC)[reply]

Range can mean two different things. It can mean the codomain, but it is most commonly is talking about the "image" of the function (see article). The difference? A codomain refers to all of the possible solutions of a function, while the range refers to the specific set of outputs related to your inputs. Let me know if I don't make sense! Griffinofwales (talk) 09:25, 21 January 2017 (UTC)[reply]

Yes that makes perfect sense !

from: https://www.mathsisfun.com/sets/domain-range-codomain.html

Codomain vs Range

The Codomain and Range are both on the output side, but are subtly different.

The Codomain is the set of values that could possibly come out. The Codomain is actually part of the definition of the function.

And The Range is the set of values that actually do come out.

Bevo (talk) 21:45, 8 May 2019 (UTC)[reply]

Surjective and non-surjective functions[change source]

Any surjective function is a non-empty set of ordered pairs among which there are no pairs with identical first components and different second components.

Any non-surjective function is the union of some surjective function F and a non-empty set H each element of which does not belong to the range of the function F.— Preceding unsigned comment added by 94.26.145.33 (talk • contribs) 01:45, 13 January 2023 (UTC)[reply]

This is a confusing definition, and it should not go into the article. Lights and freedom (talk) 05:51, 13 January 2023 (UTC)[reply]

Thank you for your remark. Please, delete my post [about surjective and non-surjective functions]. 94.26.145.33 (talk) 11:50, 13 January 2023 (UTC)[reply]