let X be non empty set ; :: thesis: for S being SigmaField of X
for M being sigma_Measure of S
for f being PartFunc of X,COMPLEX
for A being Element of S st f is_integrable_on M holds
f | A is_integrable_on M

let S be SigmaField of X; :: thesis: for M being sigma_Measure of S
for f being PartFunc of X,COMPLEX
for A being Element of S st f is_integrable_on M holds
f | A is_integrable_on M

let M be sigma_Measure of S; :: thesis: for f being PartFunc of X,COMPLEX
for A being Element of S st f is_integrable_on M holds
f | A is_integrable_on M

let f be PartFunc of X,COMPLEX ; :: thesis: for A being Element of S st f is_integrable_on M holds
f | A is_integrable_on M

let A be Element of S; :: thesis: ( f is_integrable_on M implies f | A is_integrable_on M )
assume f is_integrable_on M ; :: thesis: f | A is_integrable_on M
then ( Re f is_integrable_on M & Im f is_integrable_on M ) by Def4;
then ( (Re f) | A is_integrable_on M & (Im f) | A is_integrable_on M ) by MESFUNC6:91;
then ( Re (f | A) is_integrable_on M & Im (f | A) is_integrable_on M ) by COM91;
hence f | A is_integrable_on M by Def4; :: thesis: verum