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            | Abstract |  
            | We extend Alberti’s rank-one theorem to
 
 metric measure spaces.
  |  
          
            | Keywords
                function of bounded variation, rank-one theorem, RCD space
               |  
          
            | Mathematical Subject Classification
                Primary: 26A45, 28A75, 49Q15, 53C23
               |  
          
            | Milestones
                Received: 21 May 2022
               
                Revised: 30 January 2023
               
                Accepted: 6 June 2023
               
                Published: 12 October 2024
               |  
          
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