ETS/GRE's definition of a ring/sub-ring.

Forum for the GRE subject test in mathematics.
Legendre
Posts: 217
Joined: Wed Jun 03, 2009 1:05 am

ETS/GRE's definition of a ring/sub-ring.

Postby Legendre » Sat Sep 29, 2012 12:36 pm

Do we need a multiplicative identity?

PNT
Posts: 37
Joined: Fri Mar 11, 2011 9:01 pm

Re: ETS/GRE's definition of a ring/sub-ring.

Postby PNT » Fri Oct 05, 2012 6:32 am

It's fairly standard for rings these days to require multiplicative identity, but I expect there will be no ambiguity in that questions will explicitly state "Rings with unity/identity". I certainly don't expect there to be questions on Rings without identity but I could be wrong.

Legendre
Posts: 217
Joined: Wed Jun 03, 2009 1:05 am

Re: ETS/GRE's definition of a ring/sub-ring.

Postby Legendre » Sat Oct 06, 2012 10:17 am

Thanks. I suppose so.

I guess the most common requirement of subring questions: the subring test, isn't affected by this. Since we just need to check for unity, which hopefully will be given.




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