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Buch. Zustand: Neu. Neuware -Mathematicians do not work in isolation. They stand in a long and time honored tradition. They write papers and (sometimes) books, they read the publications of fellow workers in the eld, and they meet other mathematicians at conferences all over the world. In this way, in contact with colleagues far away and nearby, from the past (via their writings) and from the present, scienti c results are obtained whicharerecognizedasvalid.Andthat¿remarkablyenough¿regardlessofe thnic background, political inclination or religion. In this process, some distinguished individuals play a special and striking role. They assume a position of leadership. They guide the people working with them through uncharted territory, thereby making a lasting imprint on the eld. So- thing which can only be accomplished through a combination of rare talents: - usually broad knowledge, unfailing intuition and a certain kind of charisma that binds people together. AllofthisispresentinIsraelGohberg,themantowhomthisbookisdedicated,o n theoccasionof his 80thbirthday.This comes to the foregroundunmistakably from the contributions from those who worked with him or whose life was a ected by him. Gohberg¿sexceptionalqualitiesarealsoapparentfromthe articleswritten by himself, sometimes jointly with others, that are reproduced in this book. Among these are stories of his life, some dealing with mathematical aspects, others of a more general nature. Also included are reminiscences paying tribute to a close colleaguewho isnotamongusanymore,speechesorreviewshighlightingthework and personality of a friend or esteemed colleague, and responses to the laudatiös connected with the several honorary degrees that were bestowed upon him.Springer Basel AG in Springer Science + Business Media, Heidelberger Platz 3, 14197 Berlin 344 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -(12) (4) Let be the unique even non-trivial Dirichlet character mod 12, and let be the unique (odd) non-trivial Dirichlet character mod 4. Consider on the line the distributions m (12) d (x)= (m) x , even 12 m Z m (4) d (x)= (m) x . (1.1) odd 2 m Z 2 i x UnderaFouriertransformation,orundermultiplicationbythefunctionx e , the rst(resp. second)ofthesedistributionsonlyundergoesmultiplicationbysome 24th (resp. 8th) root of unity. Then, consider the metaplectic representation Met, 2 a unitary representation in L (R) of the metaplectic group G, the twofold cover of the group G = SL(2,R), the de nition of which will be recalled in Section 2: it extends as a representation in the spaceS (R) of tempered distributions. From what has just been said, if g ¿ is a point of G lying above g G,andif d = d even g ¿ 1 or d , the distribution d =Met(g¿ )d only depends on the class of g in the odd homogeneousspace G=SL(2,Z)G,uptomultiplicationbysomephasefactor, by which we mean any complex number of absolute value 1 depending only on g ¿. On the other hand, a function u S(R) is perfectly characterized by its scalar g ¿ productsagainstthedistributionsd ,sinceonehasforsomeappropriateconstants C , C the identities 0 1 g ¿ 2 2 | d ,u | dg = C u if u is even, 2 0 even L (R) GSpringer Basel AG in Springer Science + Business Media, Heidelberger Platz 3, 14197 Berlin 160 pp. Englisch.

Buch. Zustand: Neu. Neuware -Acute and chronic hepatitis and hepatitis-related diseases such as liver failure, liver cirrhosis and hepatocellular carcinoma are among the most important causes for disabilities and death. Hepatocellular injury is due to a variety of agents including viruses, toxins, radiation, injury and drugs but also bacteria, parasites and autoimmune reactions.This volume reviews today¿s knowledge about hepatitis with emphasis on comparative aspects between hepatitis in humans and animals, but also between different etiological agents. This particular viewpoint makes the book relevant for scientists from both human and veterinary medicine, gastroenterologists, pathologists, virologists and students of human and veterinary medicine.Springer Basel AG in Springer Science + Business Media, Heidelberger Platz 3, 14197 Berlin 400 pp. Englisch.

Buch. Zustand: Neu. Neuware -La théorie classique des suites de Sturm fournit un algorithme pour déterminer le nombre de racines d¿un polynôme à coefficients réels contenues dans un intervalle donné. L¿objet principal de ce mémoire est de montrer qüune généralisation adéquate de la théorie des suites de Sturm fournit entre autres choses:une notion d¿indice de Maslov pour un lacet algébrique de lagrangiens défini sur un anneau commutatif;une démonstration du théorème fondamental de la K-théorie (algébrique) hermitienne, théorème dû à M. Karoubi;une démonstration des théorèmes de périodicité de Bott (topologique), dans l¿esprit des travaux de F. Latour;un calcul du groupe K2 relatif, symplectique-linéaire, pour tous les anneaux commutatifs, dans l¿esprit des travaux de R. Sharpe.Le livre est dans la mesure du possible « self-contained » et élémentaire: il met essentiellement en oeuvre des arguments d¿algèbre linéaire ou bilinéaire. Il présente une approche unifiée de l¿indice de Maslov en termes de suites de Sturm et de formes quadratiques.Springer Basel AG in Springer Science + Business Media, Heidelberger Platz 3, 14197 Berlin 212 pp. Französisch.