Talk:Range (mathematics)

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[edit] categorical definition of range

I wanted to know how to define the range of a morphism in category theory. Wikipedia didn't know one, nor did MacLane nor that ACC online book. Therefore I made up a definition, possibly in violation of WP:NOR. Is this unacceptable? Is the definition even correct? Comments welcome. -lethe talk + 09:05, 25 March 2006 (UTC)

That is a violation of WP:NOR for sure. See maybe google books has any info on that, or mathworld or the Springer encyclopedia. Oleg Alexandrov (talk) 16:28, 25 March 2006 (UTC)

[edit] Codomain, range, image confusion

I was taught the definitions given in the article for codomain and range. In the years since and in innumerable and very modern (non-set theory) books I have seen again and again the word range referring to the so-called co-domain and the image being used for f(A). Therefore I am forced to reject the statement that "Older books sometimes call what is now called the codomain the range, and what is now called the range the image set." I think that even today this is the prevailing definition among working mathematicians. nadav 05:44, 23 October 2006 (UTC)

[edit] Sequence of integer numbers

In for example computer science and numerical computing, the range from a to b refers to a, a+1, … b, i.e. the sequence or series of integer numbers from a to b. Is this okay to mention in this article? Or what mathematical terminology (in words) is appropriate for this? Mange01 23:49, 3 December 2006 (UTC)

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