A few days ago
What are closed sets and not closed sets?
well, I’m having a pretty difficult time understanding this.
Sets Operation
{1,2,3,…} subtraction
Help me out here, and give me an example of a closed sets and not closed sets. ( simple examples please)
Top 1 Answers
A few days ago
Favorite Answer
A set of numbers is closed under an operation if applying the operation to two numbers in the set will always give another number that’s in the set.
For example, {1,2,3,…}, the set of whole numbers bigger than 0, is closed under addition, because adding any two whole numbers bigger than 0 will always give another whole number bigger than 0. You’ll never get 0 or a negative number or a fraction.
But {1,2,3,…} is NOT closed under subtraction. For example,. 1 – 2 is a negative number, and there are no negative numbers in the set. Even 3 – 3 gives 0, which is not in the set.
0
- Academic Writing
- Accounting
- Anthropology
- Article
- Blog
- Business
- Career
- Case Study
- Critical Thinking
- Culture
- Dissertation
- Education
- Education Questions
- Essay Tips
- Essay Writing
- Finance
- Free Essay Samples
- Free Essay Templates
- Free Essay Topics
- Health
- History
- Human Resources
- Law
- Literature
- Management
- Marketing
- Nursing
- other
- Politics
- Problem Solving
- Psychology
- Report
- Research Paper
- Review Writing
- Social Issues
- Speech Writing
- Term Paper
- Thesis Writing
- Writing Styles