State whether each of the following functions is injective, surjective, bijective, or none of these categories: (N is the set of natural numbers, and Σ∗ is the set of all strings over Σ.) f : N → N , f(n) = { (n − 1, if n is odd) (n + 1 otherwise).
State whether each of the following functions is injective, surjective, bijective, or none of these categories: (N is the set of natural numbers, and Σ∗ is the set of all strings over Σ.) f : N → N , f(n) = { (n − 1, if n is odd) (n + 1 otherwise).
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.2: Mappings
Problem 11E: For the given f:ZZ, decide whether f is onto and whether it is one-to-one. Prove that your decisions...
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Question
State whether each of the following functions is injective, surjective, bijective, or none of
these categories: (N is the set of natural numbers, and Σ∗
is the set of all strings over Σ.)
f : N → N , f(n) = {
(n − 1, if n is odd)
(n + 1 otherwise).
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