I have a test in Diff Eq. tommorow and part of the test is inovling the Dirac Delta function. I have no clue as to what it is at all. More specifically its Laplace and Inverse Laplace. If anyone could explain to me what the delta function is and how to use in in diff eq and what are its Laplace properties I would greatly appreciate it. The book is almost no help on this and I unfortunatley missed the class lecture on it. Thanks.