Abstract Algebra | Some basic results regarding integral domains.
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- čas přidán 24. 03. 2020
- We prove some basic results regarding integral domains. In particular, we prove a multiplicative cancellation rule and that every finite integral domain is a field.
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Careful everyone: at 7:22 I write r=0 but say r is NOT equal to zero. What I wrote is wrong while what I said was correct.
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2:00 surely you can create examples more freely. Say the simple example written is AB=0, then any XAP multiplied by (P^-1)BY simplifies to XABY=X0Y=0. It seems the video suggests restricting to the form PA(P^-1) multiplied by PB(P^-1). It feel that conjunction like thus would be necessary if we where trying to preserve an identity on the right, but since we are trying to preserve a zero matrix, we can be much less restricted
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Make videos about the topics that are missing from the playlist. thank you