For all a and b in the domain of a function f, the function is injective iff f(a) #f(b) → a=b f(a)=f(b) a=b f(a)=f(b) a b fy)=x iff f(x)=y

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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For all a and b in the domain of a function f, the function is injective iff
f(a) #f(b)
a=Db
f(a)=f(b) a=b
f(a)=f(b)
atb
o fly)=x iff f(x)=y
A Moving to another question will save this response.
5
Transcribed Image Text:For all a and b in the domain of a function f, the function is injective iff f(a) #f(b) a=Db f(a)=f(b) a=b f(a)=f(b) atb o fly)=x iff f(x)=y A Moving to another question will save this response. 5
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