## Help me t ounderstand Relations and Functions in Math

Mathematics for Computing
Nipuna
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### Help me t ounderstand Relations and Functions in Math

Relations and Functions

I found this one in BIT VLE and i didn't understand. I read the notes twice but still didn't get them

Can anyone Explain Me simply about Relations and Functions?

Here are the Topics I have for BIT in this Subject

Specifying Sets
Relation
Relations - Definitions
Relation
Composition of Relations
Direct Graph
Reflexive Relations
Symmetric Relations
Transitive Relations
Equivalence Relations
Equivalence Classes

Sorry for Asking Stupid questions from Genius people like you Are.
Neo
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Joined: Wed Jul 15, 2009 2:07 am
Location: Colombo

### Re: Help me t ounderstand Relations and Functions in Math

Sorry for Asking Stupid questions from Genius people like you Are.
ROBOT.LK has been created to help people with these types of questions. It doesn't matter you are a genius or not for ROBOT.LK. What matters is you try to share what you know as much as possible with other people.

Okay.. Let's get on with your questions.
Specifying Sets
This is about Set theory. Don't worry about the terms (names). But make sure you learn the word.
This is about "කුලක" you learned for O/Ls. If you can't remember Set operations, start from the O/L book. A/L guys knows more operations but we can learn those step by step.

Learn the terms first. Intersection, Union, Empty set, Universal set. All these covered in Sinhala in O/L I guess. Learn the symbols that represent these. If you can refer the A/L Maths part on set theory, I'm that cover all these things. However since it is required to know the theory well, refer to following wiki pages. Those are very good.

http://en.wikipedia.org/wiki/Set_(mathematics)
Relation
Relations - Definitions
Again under the set theory heading.
http://en.wikipedia.org/wiki/Relation_(mathematics)
Composition of Relations
http://en.wikipedia.org/wiki/Composition_of_relations
Direct Graph
http://en.wikipedia.org/wiki/Directed_graph
Reflexive Relations
http://en.wikipedia.org/wiki/Reflexive_relation
Symmetric Relations
http://en.wikipedia.org/wiki/Symmetric_relation
Transitive Relations
http://en.wikipedia.org/wiki/Transitive_relation
Equivalence Relations
http://en.wikipedia.org/wiki/Equivalence_relation
Equivalence Classes
http://en.wikipedia.org/wiki/Equivalence_class

Finally under wikibooks, you have everything again.
Index page: http://en.wikibooks.org/wiki/Category:Set_Theory

Introduction: http://en.wikibooks.org/wiki/Set_Theory/Sets
Relations: http://en.wikibooks.org/wiki/Set_Theory/Relations

After you learn these, you will find answering questions for the model paper is simply nothing.
Nipuna
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### Re: Help me t ounderstand Relations and Functions in Math

Thanks a Lot Friend.

I forgot to tell you, That I Know O/L Set stuff And the Subject before this one was Sets too. I got it but I stuck in this.

I will Definitely read those Wiki ones.

Thanks again. I will ask more when I get
Nipuna
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Joined: Mon Jan 04, 2010 8:02 pm
Location: Deraniyagala,SRI LANKA

### Re: Help me t ounderstand Relations and Functions in Math

Thanks Friend.
I just read Reference book of that Subject and Now I have some understanding. I am studying it now too. I got a little break to come to EC.

Thanks