Misprint?

Dear Sir,

In the proof of the lemma for the primary decomposition theorem the internet notes contain a a line with fg(a)(w1 + w2), and I was wondering whether that is the same as fg(w1 + w2)?

Thanks Sir

Reply:

Definitely not! It is actually a serious misunderstanding of the proof to think that these two expressions could be the same. Read the text again carefully.

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