must be studied in two dimensions, it is necessary that the 

 systems involved in the examples of wave diffraction be uniform 

 with respect to an axis normal to the water surface. 



The mathematical complexities of the problems vary from the 

 trivial (non-mathematical, elementary discussions) to treatments 

 involving several transformations. 



Most of the problems presented here are the products of 

 individual authors. Those readers who are interested in the rigid 

 mathematical derivation of any particular solution are referred 

 to the source of the material by the footnote at the beginning 

 of each section or the bibliography at the end of the paper. 



