
theorem
for r be Real, E be Element of L-Field, f be PartFunc of REAL,REAL
 st E = {r} holds f is E-measurable
proof
    let r be Real, E be Element of L-Field, f be PartFunc of REAL,REAL;
    assume E = {r}; then
    R_EAL f is E-measurable by Th31;
    hence f is E-measurable by MESFUNC6:def 1;
end;
