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January 28th, 2014, 07:24 AM   #1
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the zero set of an ideal

Given
Find the zero set


By definition :



So I show that we must have

and from this



hence  right?
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January 29th, 2014, 12:35 AM   #2
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Re: the zero set of an ideal

It seems to me your zero-set is too small. For example, what about (0,0,c), (0,b,0) or (a,0,0)?

Surely every element of J annihilates all of those....
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