## free basis and basis?

1. The problem statement, all variables and given/known data
What are the differences between the two?

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 Do you mean ordered basis?
 Don't think so.

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## free basis and basis?

Just surfing wiki, I get the impression that there is none. Do you have a reason to believe that there is a difference?

 Quote by quasar987 Just surfing wiki, I get the impression that there is none. Do you have a reason to believe that there is a difference?
Yeah, looks the same to me. This is what I studied in my linear algebra course: there's something called a basis and then something called an ordered basis. A basis with an ordering of elements (somewhat like an indexing set that has been fixed which maps to elements of your basis) is called an ordered basis.

I think when you say free basis, you probably mean a basis without ordering...but thats just a wild guess. I haven't come across this term (free basis) in my reading of any standard textbook on Linear Algebra (cf Hoffman/Kunze).

 I am talking about it in the sense of modules.
 Recognitions: Gold Member Homework Help Science Advisor If you look here http://en.wikipedia.org/wiki/Free_module they define a free module as a module having a free basis. But then they give the definition of a free basis and it is an exact analogy to what is simply called a 'basis' in linear algebra: http://en.wikipedia.org/wiki/Basis_%...%29#Definition Another reason why I suspect that there is no difference btw the two is the following sentence in the article about modules: "However, modules can be quite a bit more complicated than vector spaces; for instance, not all modules have a basis, and even those that do, free modules,[...] "
 Recognitions: Homework Help Science Advisor Vector spaces are modules for fields. All modules for fields are free, so in this case the two notions agree.