About clusters : A number of things of same sort gathered together or growing together.
This collection has loosely connected, many times overlapping resources arranged according a chosen topics.
Vectors --- by ---- John Peacock Good Introduction for Newbies What is a tensor --- by --- Johann Colombano-Rut Good Introduction for NewbiesDirac Delta function
Green Function
Converting to an integral equation
Boundary Value Problems in EM Theory
Relation to Energy Eigenvalues and Eigenfunctions Vectors and Tensors





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