The Coulomb problem for continuous charge distributions is a central p
roblem in physics. Powerful methods, that scale linearly with system s
ize and that allow us to use different resolutions in different region
s of space are therefore highly desirable. Using wavelet based Multi R
esolution Analysis we derive a novel method which has these properties
. The power and accuracy of the method is illustrated by applying it t
o the calculation of the electrostatic potential of a full three-dimen
sional all-electron uranium dimer. (C) 1998 Elsevier Science Ltd.