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Is there anything in the literature about $2k$-nary infix grammars, in particular easy validity and parsing schemes?


$L=langle G_1,G_2 rangle in R$?













0












$begingroup$


Suppose $k$ is a positive integer: I'm working with the $2k$-nary infix grammar
$$
S to mathrmopd | SSldots S mathrmopr SSldots S,
$$

where there are $k$ $S$s in each side of the $mathrmopr$.



This is a CFG, so the rich theory of CFG's and PDA's applies, and it's also obvious that the grammar is ambiguous as is (without parentheses or precedence rules). But far more simplistically --



I have found a very easy algorithm involving just counting how many $mathrmopd$s are in between pairs of $mathrmopr$s to validate expressions in the language and which provides a parse for valid expressions.



Is this result new and/or interesting?










share|cite|improve this question











$endgroup$
















    0












    $begingroup$


    Suppose $k$ is a positive integer: I'm working with the $2k$-nary infix grammar
    $$
    S to mathrmopd | SSldots S mathrmopr SSldots S,
    $$

    where there are $k$ $S$s in each side of the $mathrmopr$.



    This is a CFG, so the rich theory of CFG's and PDA's applies, and it's also obvious that the grammar is ambiguous as is (without parentheses or precedence rules). But far more simplistically --



    I have found a very easy algorithm involving just counting how many $mathrmopd$s are in between pairs of $mathrmopr$s to validate expressions in the language and which provides a parse for valid expressions.



    Is this result new and/or interesting?










    share|cite|improve this question











    $endgroup$














      0












      0








      0





      $begingroup$


      Suppose $k$ is a positive integer: I'm working with the $2k$-nary infix grammar
      $$
      S to mathrmopd | SSldots S mathrmopr SSldots S,
      $$

      where there are $k$ $S$s in each side of the $mathrmopr$.



      This is a CFG, so the rich theory of CFG's and PDA's applies, and it's also obvious that the grammar is ambiguous as is (without parentheses or precedence rules). But far more simplistically --



      I have found a very easy algorithm involving just counting how many $mathrmopd$s are in between pairs of $mathrmopr$s to validate expressions in the language and which provides a parse for valid expressions.



      Is this result new and/or interesting?










      share|cite|improve this question











      $endgroup$




      Suppose $k$ is a positive integer: I'm working with the $2k$-nary infix grammar
      $$
      S to mathrmopd | SSldots S mathrmopr SSldots S,
      $$

      where there are $k$ $S$s in each side of the $mathrmopr$.



      This is a CFG, so the rich theory of CFG's and PDA's applies, and it's also obvious that the grammar is ambiguous as is (without parentheses or precedence rules). But far more simplistically --



      I have found a very easy algorithm involving just counting how many $mathrmopd$s are in between pairs of $mathrmopr$s to validate expressions in the language and which provides a parse for valid expressions.



      Is this result new and/or interesting?







      context-free-grammar






      share|cite|improve this question















      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Mar 20 at 20:02









      Daniele Tampieri

      2,62221022




      2,62221022










      asked Mar 20 at 18:20









      Steven MinskerSteven Minsker

      11




      11




















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