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              Abstract
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 We extend Gérard’s formula for the solution of the Benjamin–Ono equation on the
 line to square integrable and real valued initial data. Combined with this
 formula, we also extend Gérard’s formula for the zero dispersion limit of the
 Benjamin–Ono equation on the line to more singular initial data. In the
 derivation of the extension of the formula for the zero dispersion limit, we
 also find an interesting integral equality, which might be useful in other
 contexts.
  
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              Keywords
              
                Benjamin–Ono equation, explicit formula, zero dispersion
                limit
               
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              Mathematical Subject Classification
              
                Primary: 35C99, 47B35
               
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              Milestones
              
                Received: 3 March 2024
               
              
                Revised: 4 November 2024
               
              
                Accepted: 17 December 2024
               
              
                Published: 23 February 2025
               
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            | © 2025 The Author(s), under
            exclusive license to MSP (Mathematical Sciences
            Publishers). | 
           
         
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