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If you like textbooks, try Section 1.3 of Artin's Algebra (find it at https://media.githubusercontent.com/media/storagelfs/books/main/Applied%20Mathematics/Alge
by exmadscientist 2y ago
If you like textbooks, try Section 1.3 of Artin's Algebra (find it at https://media.githubusercontent.com/media/storagelfs/books/main/Applied%20Mathematics/Algebra/Artin.%20Algebra.%201991.pdf https://media.githubusercontent.com/media/storagelfs/books/m... among others).
Do be warned that Algebra is a... high-octane... text written for serious math students and can be... powerful.