theorem :: MESFUN6C:45

for X being non empty set
for S being SigmaField of X
for M being sigma_Measure of S
for f being PartFunc of X,COMPLEX
for c being Complex
for B being Element of S st f is_integrable_on M holds
Integral_on (M,B,(c (#) f)) = c * (Integral_on (M,B,f))