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November 1st, 2016, 02:42 AM   #1
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equivalence relation - words from set of letters

Hi Im stuck on a Task here, someone help

I have a set of letters E={a,b,c} from wich words can be formed.

There is a relation between two words if they are formed of the same factors
(A factor here is the combination of 4 letters, for example the word aababba has the factors aaba, abab, babb, abba)

Now I have to prove i this is an equivalence relation.

I think this is true but dont know how to properly prove it.

Note: Hope my technical terms are correct, Im not a native english speaker.
Floryan is offline  
November 1st, 2016, 02:14 PM   #2
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I am not sure what you need to prove. You haven't defined the equivalence relationship. You can simply define two words to be equivalent if they have the same factors.
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