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Ab initio quantum chemistry has emerged as an important tool in chemical research and is appliced to a wide variety of problems in chemistry and molecular physics. Recent developments of computational methods have enabled previously intractable chemical problems to be solved using rigorous quantum-mechanical methods.

This is the first comprehensive, up-to-date and technical work to cover all the important aspects of modern molecular electronic-structure theory. Topics covered in the book include:
* Second quantization with spin adaptation

* Gaussian basis sets...

Silver is a natural metal and is geologically rare. It has been used in making jewellery, electronic equipment and photographic processes amongst other products. People are exposed to very low amount of silver daily, an amount that is not threatening their health. However, silver is persistent and bioaccumulate in the environment, which makes it an environmental hazard. Although silver is mostly found under its ionic form, silver nano particles are becoming more and more part of the anthropogenic inputs. There are many unknown aspects of silver nano particles, which makes them hard to monitor...