ABSTRACT

Vladimir Gorshkov https://www.w3.org/1998/Math/MathML">   a https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429208034/745555c6-8054-4b10-b2e1-493e2cb69343/content/eq1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> , Dmitri Muraviev https://www.w3.org/1998/Math/MathML">   a , 1 * https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429208034/745555c6-8054-4b10-b2e1-493e2cb69343/content/eq1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> and Abraham Warshawsky https://www.w3.org/1998/Math/MathML">   b https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429208034/745555c6-8054-4b10-b2e1-493e2cb69343/content/eq1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>