SWI-Prolog -- sup/2

Documentation
- Reference manual
  - The SWI-Prolog library
    - library(clpqr): Constraint Logic Programming over Rationals and Reals
      - Solver predicates
        
        {}/1
        
        entailed/1
        
        inf/2
        
        sup/2
        
        minimize/1
        
        maximize/1
        
        bb_inf/5
        
        bb_inf/4
        
        bb_inf/3
        
        dump/3
- Packages

sup(+Expression, -Sup)

Computes the supremum of Expression within the current state of the constraint store and returns that supremum in Sup. This predicate does not change the constraint store.