My Math Forum  

Go Back   My Math Forum > College Math Forum > Applied Math

Applied Math Applied Math Forum

LinkBack Thread Tools Display Modes
April 20th, 2013, 09:02 PM   #1
Joined: Apr 2013

Posts: 2
Thanks: 0

Subset of a Function g[a] subset g[b]

Hi thanks for your help,

Given a function g: X -> Y , and A subset B subset X , prove that g[A] subset g[B]

It seems kinda obvious to me, since a function cannot map to more than one element and A subset B is given, i'm unsure how to write this as a proof however?
redgirl43 is offline  
April 21st, 2013, 06:20 AM   #2
Global Moderator
CRGreathouse's Avatar
Joined: Nov 2006
From: UTC -5

Posts: 16,046
Thanks: 938

Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms
Re: Subset of a Function g[a] subset g[b]

Given an element a in A, show that g(a) is in G(B).
CRGreathouse is offline  

  My Math Forum > College Math Forum > Applied Math

function, subset

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bounded Subset of Function Space DonaldDuck Real Analysis 1 June 18th, 2013 09:29 AM
subset of permutations andreaugust Applied Math 16 June 22nd, 2012 11:42 AM
Subset problem pikachu26134 Algebra 6 July 26th, 2011 07:34 PM
Countable Subset Jimena29 Real Analysis 4 November 10th, 2009 02:09 PM
Subset of S sansar Linear Algebra 1 March 16th, 2009 07:42 AM

Copyright © 2019 My Math Forum. All rights reserved.