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Can an alphabet for a Turing machine contain subsets of other alphabets?


Can a Turing Machine decide only non-regular languages?Turing Machines: Arbitrary alphabet equivalence with binary alphabetDoubts about infinite language decided by a turing machineCan input to a Turing machine be of infinite length?turing machine for the language L =w#w' where w<w'Context formal language recognizing even number of 0's and odd number of 1'sCan an alphabet be $ε$ or $mathbbN$?What is the difference between the input set of a BSS RAM and a language?Is there a name for this type of Turing machine?Questions about Turing Machine






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








3












$begingroup$


For example;



Is 0,1,a,b,c,d,e a valid alphabet to form a language over and is it usable in any context?










share|cite|improve this question









$endgroup$




















    3












    $begingroup$


    For example;



    Is 0,1,a,b,c,d,e a valid alphabet to form a language over and is it usable in any context?










    share|cite|improve this question









    $endgroup$
















      3












      3








      3





      $begingroup$


      For example;



      Is 0,1,a,b,c,d,e a valid alphabet to form a language over and is it usable in any context?










      share|cite|improve this question









      $endgroup$




      For example;



      Is 0,1,a,b,c,d,e a valid alphabet to form a language over and is it usable in any context?







      formal-languages turing-machines






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked 9 hours ago









      WeCanBeFriendsWeCanBeFriends

      2897 bronze badges




      2897 bronze badges























          1 Answer
          1






          active

          oldest

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          3












          $begingroup$

          An alphabet is a set of symbols, therefore if your you treat $a,b,c$ as a single symbol, it is a valid alphabet.






          share|cite|improve this answer









          $endgroup$














          • $begingroup$
            Any example usage of this?
            $endgroup$
            – WeCanBeFriends
            7 hours ago











          • $begingroup$
            @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
            $endgroup$
            – WeCanBeFriends
            7 hours ago










          • $begingroup$
            @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
            $endgroup$
            – Gogis
            5 hours ago













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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          3












          $begingroup$

          An alphabet is a set of symbols, therefore if your you treat $a,b,c$ as a single symbol, it is a valid alphabet.






          share|cite|improve this answer









          $endgroup$














          • $begingroup$
            Any example usage of this?
            $endgroup$
            – WeCanBeFriends
            7 hours ago











          • $begingroup$
            @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
            $endgroup$
            – WeCanBeFriends
            7 hours ago










          • $begingroup$
            @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
            $endgroup$
            – Gogis
            5 hours ago















          3












          $begingroup$

          An alphabet is a set of symbols, therefore if your you treat $a,b,c$ as a single symbol, it is a valid alphabet.






          share|cite|improve this answer









          $endgroup$














          • $begingroup$
            Any example usage of this?
            $endgroup$
            – WeCanBeFriends
            7 hours ago











          • $begingroup$
            @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
            $endgroup$
            – WeCanBeFriends
            7 hours ago










          • $begingroup$
            @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
            $endgroup$
            – Gogis
            5 hours ago













          3












          3








          3





          $begingroup$

          An alphabet is a set of symbols, therefore if your you treat $a,b,c$ as a single symbol, it is a valid alphabet.






          share|cite|improve this answer









          $endgroup$



          An alphabet is a set of symbols, therefore if your you treat $a,b,c$ as a single symbol, it is a valid alphabet.







          share|cite|improve this answer












          share|cite|improve this answer



          share|cite|improve this answer










          answered 7 hours ago









          GogisGogis

          535 bronze badges




          535 bronze badges














          • $begingroup$
            Any example usage of this?
            $endgroup$
            – WeCanBeFriends
            7 hours ago











          • $begingroup$
            @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
            $endgroup$
            – WeCanBeFriends
            7 hours ago










          • $begingroup$
            @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
            $endgroup$
            – Gogis
            5 hours ago
















          • $begingroup$
            Any example usage of this?
            $endgroup$
            – WeCanBeFriends
            7 hours ago











          • $begingroup$
            @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
            $endgroup$
            – Gogis
            7 hours ago










          • $begingroup$
            What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
            $endgroup$
            – WeCanBeFriends
            7 hours ago










          • $begingroup$
            @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
            $endgroup$
            – Gogis
            5 hours ago















          $begingroup$
          Any example usage of this?
          $endgroup$
          – WeCanBeFriends
          7 hours ago





          $begingroup$
          Any example usage of this?
          $endgroup$
          – WeCanBeFriends
          7 hours ago













          $begingroup$
          @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
          $endgroup$
          – Gogis
          7 hours ago




          $begingroup$
          @WeCanBeFriends Exactly like any other alphabet. $a,b,c$ is just another symbol, so it can be written on a single tape cell, but none of the $a, b$ or $c$ can be written individually, the same way you cannot write just a half of $0$ or any part of any other symbol.
          $endgroup$
          – Gogis
          7 hours ago












          $begingroup$
          @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
          $endgroup$
          – Gogis
          7 hours ago




          $begingroup$
          @WeCanBeFriends But this only concerns the standard model of the Turing machine and there are many, many others.
          $endgroup$
          – Gogis
          7 hours ago












          $begingroup$
          What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
          $endgroup$
          – WeCanBeFriends
          7 hours ago




          $begingroup$
          What is the advantage to having a.b,c in the alphabet, as opposed to another symbol k? I'm not sure of a situation where it would be useful to have this set
          $endgroup$
          – WeCanBeFriends
          7 hours ago












          $begingroup$
          @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
          $endgroup$
          – Gogis
          5 hours ago




          $begingroup$
          @WeCanBeFriends Random example from the top of my head: Imagine you would need to construct a TM that would be given a set of 3 numbers from the range $0-100$ and accept iff their average would be $> 47$. It would be more convenient to describe the TM using an alphabet where each input would be represented by a single symbol, because that way the TM would only need 2 states.
          $endgroup$
          – Gogis
          5 hours ago

















          draft saved

          draft discarded
















































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