
theorem Th45:
for I be Subset of REAL, J be non empty closed_interval Subset of REAL,
  x be Element of REAL, f be PartFunc of [:RNS_Real,RNS_Real:],RNS_Real,
  g be PartFunc of [:REAL,REAL:],REAL, Pg1 be PartFunc of REAL,REAL,
  E be Element of L-Field
 st x in I & dom f = [:I,J:] & f is_continuous_on [:I,J:] & f = g
  & Pg1 = ProjPMap1(|.R_EAL g.|,x) & E = J holds Pg1 is E-measurable
proof
    let I be Subset of REAL, J be non empty closed_interval Subset of REAL,
    x be Element of REAL,
    f be PartFunc of [:RNS_Real,RNS_Real:],RNS_Real,
    g be PartFunc of [:REAL,REAL:],REAL,
    Pg1 be PartFunc of REAL,REAL, E be Element of L-Field;
    assume that
A1:  x in I and
A2:  dom f = [:I,J:] and
A3:  f is_continuous_on [:I,J:] and
A4:  f = g and
A5:  Pg1 = ProjPMap1(|.R_EAL g.|,x) and
A6:  E = J;

A7: dom Pg1 = J by A1,A2,A4,A5,Th27;
    Pg1|J is bounded & Pg1 is_integrable_on J by A1,A2,A3,A4,A5,Th44;
    hence thesis by A7,A6,MESFUN14:49;
end;
