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How many equivalence classes does this equivalence relation have?


Equivalence classes for a Relation on a product set.Help with partitions, equivalence classes, equivalence relations.Equivalence relation and equivalence classes given function and relationEquivalence classes with this relation equivalenceDoes the relation $R = ( x $ create a partition for a set $A = 1,2,3,4,5,6,7,8,9,10$? If so, why?On the equivalence classes of a relation (Myhill-Nerode theorem)Breaking an equivalence relation into equivalence classesClasses of an equivalence relationFinding the equivalence classes of a singleton setCounting the number of equivalence classes (expecting 7 from the DFA states but seeing only 6)













0












$begingroup$


Let Σ=0,1, ≡L is an equivalence relation for set L Let s = 10100 and L = s be the language containing only string s



L−x = y:xy∈L



x ≡L y ⟺ L−x = L−y



I can count 6:



L-empty



L-1



L-10



L-101



L-1010



L-10100



However I believe the there should be 7 states here. Can anyone point out what I'm missing please?
What would "the partition of Σ∗ in the equivalence classes of ≡L." be then?



Thanks for any help!










share|cite|improve this question







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Check out our Code of Conduct.







$endgroup$











  • $begingroup$
    What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
    $endgroup$
    – gandalf61
    Mar 11 at 15:46










  • $begingroup$
    An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
    $endgroup$
    – William Elliot
    Mar 12 at 2:47















0












$begingroup$


Let Σ=0,1, ≡L is an equivalence relation for set L Let s = 10100 and L = s be the language containing only string s



L−x = y:xy∈L



x ≡L y ⟺ L−x = L−y



I can count 6:



L-empty



L-1



L-10



L-101



L-1010



L-10100



However I believe the there should be 7 states here. Can anyone point out what I'm missing please?
What would "the partition of Σ∗ in the equivalence classes of ≡L." be then?



Thanks for any help!










share|cite|improve this question







New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$











  • $begingroup$
    What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
    $endgroup$
    – gandalf61
    Mar 11 at 15:46










  • $begingroup$
    An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
    $endgroup$
    – William Elliot
    Mar 12 at 2:47













0












0








0





$begingroup$


Let Σ=0,1, ≡L is an equivalence relation for set L Let s = 10100 and L = s be the language containing only string s



L−x = y:xy∈L



x ≡L y ⟺ L−x = L−y



I can count 6:



L-empty



L-1



L-10



L-101



L-1010



L-10100



However I believe the there should be 7 states here. Can anyone point out what I'm missing please?
What would "the partition of Σ∗ in the equivalence classes of ≡L." be then?



Thanks for any help!










share|cite|improve this question







New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




Let Σ=0,1, ≡L is an equivalence relation for set L Let s = 10100 and L = s be the language containing only string s



L−x = y:xy∈L



x ≡L y ⟺ L−x = L−y



I can count 6:



L-empty



L-1



L-10



L-101



L-1010



L-10100



However I believe the there should be 7 states here. Can anyone point out what I'm missing please?
What would "the partition of Σ∗ in the equivalence classes of ≡L." be then?



Thanks for any help!







relations equivalence-relations






share|cite|improve this question







New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|cite|improve this question







New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|cite|improve this question




share|cite|improve this question






New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked Mar 11 at 10:38









Jay.FJay.F

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82




New contributor




Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor





Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Jay.F is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











  • $begingroup$
    What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
    $endgroup$
    – gandalf61
    Mar 11 at 15:46










  • $begingroup$
    An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
    $endgroup$
    – William Elliot
    Mar 12 at 2:47
















  • $begingroup$
    What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
    $endgroup$
    – gandalf61
    Mar 11 at 15:46










  • $begingroup$
    An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
    $endgroup$
    – William Elliot
    Mar 12 at 2:47















$begingroup$
What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
$endgroup$
– gandalf61
Mar 11 at 15:46




$begingroup$
What about all the other strings such as $0$, $00$, $01$, $11$ etc. for which $L-x=$ ?
$endgroup$
– gandalf61
Mar 11 at 15:46












$begingroup$
An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
$endgroup$
– William Elliot
Mar 12 at 2:47




$begingroup$
An equivalence relation for a set L can only partition L and no others sets. As L is a singleton set, there is exactly one equivalence class, namely L.
$endgroup$
– William Elliot
Mar 12 at 2:47










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