1. Section 7.1, exercises 1,2,3
2. Section 7.1, exercises 5,6.
Submit solutions to 5(a,f), 6(c,f)
Section 7.1, exercise 7
3. Section 7.1, exercise 11. Also give an
example of a ring R that is not an integral domain and for which x2
= 1 does not imply that x is -1 or +1.
4. Section 7.1, exercises 15,16
Section 7.1, exercise 25
Read Exercises 28-30, Section 7.1 [These
exercises describe examples where an element has a right inverse but
not a left inverse and of an element which is a left zero divisor
but not a right zero divisor -- underscoring that one should be
careful in noncommutative rings.]
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