6:05 2Z6 is not a good example because it does have an identity, 4 is the identity because 4*4=16=4(mod 6) and 2*4=4*2=8=2(mod 6) A better example would be 2Z8.
I got 0:17 seconds into this video before I started screaming. Thankfully it looks like there's a separate video explaining zero divisors. Bless, we live to math another day.
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6:05 2Z6 is not a good example because it does have an identity, 4 is the identity because 4*4=16=4(mod 6)
and 2*4=4*2=8=2(mod 6)
A better example would be 2Z8.
I got 0:17 seconds into this video before I started screaming. Thankfully it looks like there's a separate video explaining zero divisors. Bless, we live to math another day.
Why would that make you scream
Thank you. The best explanation!
very useful.thx
I feel that there might be a mistake in video title :)
You are right! I fixed it.