The cokernel of a group homomorphism f:A⟶B of Abelian groups (modules, or abstract vector spaces) is the quotient group (quotient module or quotient space, respectively) B/Image(f).
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Jonathan is doing really well in all of his classes this semester, 5 A’s & 2 B’s (he has a computer essentials class instead of PLC). In his Algebra class that Nathan is helping him with he has an A+.
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