On Green's Formula for Half‐Spaces

I am indebted to F. T. Brawn for pointing out that Theorem 2 is incorrect in its generality. In fact, one has to weaken either the hypothesis or the result. An additional hypothesis is more appropriate to the context of the paper: THEOREM 2. If s ε S t , v is the measure distribution Δ s and∫ R n × { a }d v = 0   ( a > 0 )then the mean M s is continuously differentiate on (0, +∞) and for a > 0 5d M sd y( a ) = − ∫ D ad vThe relation (13) obtained in the proof of Theorem 2 is now correct and the proof of Theorem 2 given on p. 543 does not need any alteration.