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• ObjectIDToColor() : Rgl
• ObjectName() : RooFit
• ObjectProxy_Check() : PyROOT
• ObjectProxy_CheckExact() : PyROOT
• Odd() : TMath
• Offset() : RooFit
• op_dealloc_nofree() : PyROOT
• OpenFile() : TMVA::TMVAGlob
• operator &() : ROOT::Experimental::Hist , TMVA::DNN
• operator &=() : TMVA::DNN
• operator!=() : ROOT::Experimental::Internal , ROOT::Experimental , ROOT::RDF , std::__ROOT
• operator"" _normal() : ROOT::Experimental
• operator"" _px() : ROOT::Experimental
• operator"" _user() : ROOT::Experimental
• operator*() : ROOT::Math::Impl , ROOT::Math , ROOT::Minuit2
• operator+() : ROOT::Math , ROOT::Minuit2
• operator-() : ROOT::Math , ROOT::Minuit2
• operator/() : ROOT::Math , ROOT::Minuit2
• operator<() : Memstat , nlohmann::detail , ROOT::Experimental::Internal , ROOT::Experimental , TMVA
• operator<<() : RooFit , ROOT::Fit , ROOT::Internal , ROOT::Math::detail , ROOT::Math::Impl , ROOT::Math , ROOT::Minuit2 , ROOT::VecOps , TMVA::kNN , TMVA
• operator<=() : ROOT::Experimental::Internal , ROOT::Experimental
• operator==() : ROOT::Experimental::Internal , ROOT::Experimental , ROOT::Internal , ROOT::RDF , std::__ROOT
• operator>() : ROOT::Experimental::Internal , ROOT::Experimental
• operator>=() : ROOT::Experimental::Internal , ROOT::Experimental
• operator>>() : ROOT::Math::detail , ROOT::Math , TMVA
• operator_equal_impl() : ROOT::Detail
• operator|() : TMVA::DNN
• operator|=() : TMVA::DNN
• Optimize() : RooFit
• Outer_prod() : ROOT::Minuit2
• Outer_product() : ROOT::Minuit2
• OuterProduct() : ROOT::Minuit2
• OutputFile() : RooFit
• OutputStream() : RooFit
• OwnLinked() : RooFit
• ToHumanReadableSize() : ROOT
• Topic() : RooFit
• ToString() : ROOT::Math::Util