“…The most widespread use of wavelets is still in the image compression techniques [2,3], and the other applications are also mainly analyzers. Wavelets can build a basis for differential equation discretisation [4] and solving [5,6,7], and the solvers have been developed and tested in various fields of science from diffusions to electromagnetic waves [8,9,10,11]. In electron structure calculations wavelet basis has been present since the early nineties [12,13,14,15], and in the previous decade both a wavelet based [13,14,16] and a multiwavelet based [17,18,19] solver have been developed with chemical accuracy and massively parallel computation possibility.…”