theorem
for X be non empty set, S be SigmaField of X, M be sigma_Measure of S holds
  L-1-Space M = Lp-Space(M,1)
proof
   let X be non empty set,
       S be SigmaField of X,
       M be sigma_Measure of S;
   Pre-L-Space M = Pre-Lp-Space(M,1) by Th75;
   hence thesis by Th76;
end;
