The space of Henstock integrable functions of two variables.
It is known that there is no natural Banach norm on the space of -dimensional Henstock-Kurzweil integrable functions on . We show that the space is the uncountable union of Fréchet spaces . On each space, an -norm is defined. A -convergent sequence is equivalent to a control-convergent sequence. Furthermore, an -norm is also defined for a -continuous linear operator. Hence, many important results in functional analysis hold for the space. It is well-known that every control-convergent...
Some properties of absolutely continuous variational measures associated with local systems of sets are established. The classes of functions generating such measures are described. It is shown by constructing an example that there exists a -adic path system that defines a differentiation basis which does not possess Ward property.