Interchanging “if” and “then”





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AFAIK, normally one would write:



If c is zero or b2=4 a c, then and only then there exists a unique solution of 0=a+bx+cx2.



Is it possible to interchange the if and the then clauses to emphasize the consequence? Is the following sentence good English?



Then and only then there exists a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.



Looking at the answers to another question I have the impression that even the following should be more correct(?)



Then and only then exists there a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.









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    AFAIK, normally one would write:



    If c is zero or b2=4 a c, then and only then there exists a unique solution of 0=a+bx+cx2.



    Is it possible to interchange the if and the then clauses to emphasize the consequence? Is the following sentence good English?



    Then and only then there exists a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.



    Looking at the answers to another question I have the impression that even the following should be more correct(?)



    Then and only then exists there a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.









    share







    New contributor




    Tobias is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      AFAIK, normally one would write:



      If c is zero or b2=4 a c, then and only then there exists a unique solution of 0=a+bx+cx2.



      Is it possible to interchange the if and the then clauses to emphasize the consequence? Is the following sentence good English?



      Then and only then there exists a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.



      Looking at the answers to another question I have the impression that even the following should be more correct(?)



      Then and only then exists there a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.









      share







      New contributor




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












      AFAIK, normally one would write:



      If c is zero or b2=4 a c, then and only then there exists a unique solution of 0=a+bx+cx2.



      Is it possible to interchange the if and the then clauses to emphasize the consequence? Is the following sentence good English?



      Then and only then there exists a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.



      Looking at the answers to another question I have the impression that even the following should be more correct(?)



      Then and only then exists there a unique solution of 0=a+b x+c x2, if c is zero or b2=4 a c.







      word-order inversion





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      asked 1 min ago









      TobiasTobias

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