A function exhibiting this type of behaviour has been constructed in [9].
It became clear that the Riemann integral should be replaced by some other type of integral, better suited for dealing with limit processes.
Section 2 presents two $L^1$-type characterizations.
Then $A$ is an algebra of type II.
All of the action in creating $S_{i+1}$ takes place in the individual cells of type 2 or 3.
It is a simple matter to remove all type 1 edges.
Therefore, the system (5) has a solution of the sought-for type.
for all $f$ of the type specified in Theorem 4
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