Logarithmic integral function

Abstract: Preface Introduction 1. Elementary theorems 2. The prime number theorem 3. Further theory of ( ). applications 4. Explicit formulae 5. Irregularities of distribution Bibliography.

Abstract: In an air-delivered land mine, a system for expelling an explosive warhead from beneath the ground including an inner cylindrical shell containing an explosive material, the inner shell being concentrically positioned within an outer cylindrical shell which itself has an outer aerodynamic configuration. A rocket engine which functions as both a gas generator and thruster is fixed to an end of the inner shell actuatable in response to an influence sensor. The inner shell is fixed to the outer shell at an annular flange by a retaining ring whose threads are sheared when sufficient pressure is generated by the actuated rocket engine. Subsequently, the rocket engine thrusts the inner shell from the outer shell to a position above the ground whereupon a suitable device, such as a lanyard whose ends are connected to the inner shell and to a firing switch located on the outer shell, initiates the explosive at a predetermined height.