My Math Forum  

Go Back   My Math Forum > Math Forums > Math

Math General Math Forum - For general math related discussion and news

LinkBack Thread Tools Display Modes
March 15th, 2017, 06:10 PM   #1
Joined: Mar 2017
From: canada

Posts: 1
Thanks: 0

Unhappy Sets (cardinality)

What is meant by odd and even cardinality in set theory. What are formulas to use them?

Last edited by skipjack; August 7th, 2017 at 10:23 PM.
NabeelUsmani is offline  
August 7th, 2017, 10:24 PM   #2
Global Moderator
Joined: Dec 2006

Posts: 20,759
Thanks: 2138

Do you still need help with this?
skipjack is offline  
August 8th, 2017, 04:29 PM   #3
Global Moderator
Joined: May 2007

Posts: 6,770
Thanks: 700

I presume the terms refer only to sets with finite number of elements.
mathman is offline  
September 1st, 2017, 08:42 AM   #4
Math Team
Joined: Jan 2015
From: Alabama

Posts: 3,264
Thanks: 902

For finite sets, the "cardinality" is just the number of elements in the set. A set has even cardinality if it contains an even number of elements and has odd cardinality if it contains an odd number of elements. {a, b, c} has three elements so has odd cardinality. {a, b, c, d} has four elements so has even cardinality.
Country Boy is offline  

  My Math Forum > Math Forums > Math

cardinality, sets

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cardinality of generated sets Ezio Abstract Algebra 0 September 4th, 2015 02:06 AM
Open Sets and Closed Sets fienefie Real Analysis 6 February 24th, 2015 02:14 PM
Cardinality of integers equals cardinality of reals BenFRayfield Number Theory 0 February 15th, 2014 02:55 PM
What is the cardinality of each of the following sets? Phatossi Real Analysis 2 November 4th, 2012 09:14 PM
Cardinality, Sets, in one triple Question. Aeonitis Applied Math 4 August 4th, 2010 07:32 AM

Copyright © 2019 My Math Forum. All rights reserved.