“…The integral in (23), if improper, converges, and its value is finite if the value of the limit in expression (25) does not depend on the choice of the sequence {( , , )}. For ( , , ) = ( 0 , 0 , 0 ) and for ( , , ) = ( 1 , 1 , 1 ), this integral does not converge because the value of the limit in expression (25) depends on the choice of the sequence {( , , )} and equals either ∞ or zero or the limit does not exist.…”