Let f be the function from {p,q,r,s,t} to {3, 4, 5, 6} defined by f(p) = 6, f(q) = 3, f(r) = 4, f(s) = 5 and f(t)=6. (In order to get full credit you have to explain why) i. Is f an onto function? if so why? ii. is fa one-to-one function? if so why? iii. is function f is "one-to-one correspondence"? if so why?

Let f be the function from {p,q,r,s,t} to {3, 4, 5, 6} defined by f(p) = 6, f(q) = 3, f(r) = 4, f(s) = 5 and f(t)=6. (In order to get full credit you have to explain why) i. Is f an onto function? if so why? ii. is fa one-to-one function? if so why? iii. is function f is "one-to-one correspondence"? if so why?

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

Section: Chapter Questions

Problem 1PE

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Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.

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Let f be the function from {p,q,r,s,t} to {3, 4, 5, 6} defined by f(p) = 6, f(q) = 3, f(r) = 4, f(s) = 5 and f(t)=6. (In order
to get full credit you have to explain why)
i. Is f an onto function? if so why?
ii. is fa one-to-one function? if so why?
iii. is function f is "one-to-one correspondence"? if so why?

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