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2 votes
2 answers
377 views

Is a circle a multivalued function?

I don't really understand multi-valued function. I hope one of you can make me understand it. What I've learned from google, I suppose that a multi-valued function is a binary relation that maps the ...
user516076's user avatar
  • 2,200
10 votes
3 answers
1k views

Significance of Codomain of a Function

We know that Range of a function is a set off all values a function will output. While Codomain is defined as "a set that includes all the possible values of a given function." By knowing ...
Thulashitharan D's user avatar
0 votes
2 answers
89 views

Is there a name for a real-valued function whose input is also real?

I'm trying to write a sentence about a function $f:\mathbb{R}\to \mathbb{R}$, and I want to refer to it as real valued or as a scalar function, or some similar term, but I want that term to also ...
Mark's user avatar
  • 1,361
2 votes
3 answers
1k views

What qualifies as a polynomial?

I have a very simple question regarding the definition of polynomials (with real coefficients). What I've seen so far in terms of defintions: A polynomial $p(x)$ is a function that can be written in ...
harlekin's user avatar
  • 8,800