In an algebra book you read the following definition: The function g : Y → X is the inverse of the function f : X → Y if the two diagrams in Figure 1.9 commute. Is this any different from our definition of inverses? Can you draw one diagram—with four nodes and five arrows—that is commutative if and only if g is the inverse of f?

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In an algebra book you read the following definition: The function g : Y → X is the inverse of the function f : X → Y if the two diagrams in Figure 1.9 commute.

Is this any different from our definition of inverses? Can you draw one diagram—with four nodes and five arrows—that is commutative if and only if g is the inverse of f?

 

f
X-
Y
Y
X
f
1x
ly
Figure 1.9. The two diagrams commute if and only if f and g are inverses.
Transcribed Image Text:f X- Y Y X f 1x ly Figure 1.9. The two diagrams commute if and only if f and g are inverses.
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