Selman Akbulut's Casson's Invariant for Oriented Homology Three-Spheres: An PDF

By Selman Akbulut

ISBN-10: 0691085633

ISBN-13: 9780691085630

Within the spring of 1985, A. Casson introduced an enticing invariant of homology 3-spheres through buildings on illustration areas. This invariant generalizes the Rohlin invariant and provides wonderful corollaries in low-dimensional topology. within the fall of that very same yr, Selman Akbulut and John McCarthy held a seminar in this invariant. those notes grew out of that seminar. The authors have attempted to stay just about Casson's unique define and continue by means of giving wanted info, together with an exposition of Newstead's effects. they've got usually selected classical concrete methods over basic tools. for instance, they didn't try to provide gauge idea factors for the result of Newstead; as a substitute they his unique innovations.

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Additional resources for Casson's Invariant for Oriented Homology Three-Spheres: An Exposition. (MN-36) (Mathematical Notes)

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Les chevauchements de missions, de politiques et de programmes publics, leur étalement dans le temps et dans l’espace, les interférences politiques sont des obstacles à l’évaluation des résultats (Carroll, 2003 ; Lindquist, 1998 ; English et Lindquist, 1998). Des difficultés relatives à leur mesure pourraient aussi rendre plus ou moins pertinent tout exercice d’évaluation de politiques et de programmes publics qui relèvent de mandats aussi précis et circonscrits que le sont la sécurité et la santé publique (Jorjani, 1998, au Canada ; Long et Franklin, 2004, aux États-Unis ; McHugh, 1997, au RoyaumeUni).

Videmment, elle offre beaucoup de sécurité à ses employés : ils sont protégés par les normes et les règles mais, avec le temps, ils courent le risque de s’ennuyer. En fait, c’est une structure où l’on échange sa possibilité d’autonomie et de liberté contre des règles parfois contraignantes qui nous protègent et nous sécurisent. La structure Athéna est axée sur un projet déterminé que l’on peut représenter par un filet de pêcheur. Le filet ne peut être plus fort que la plus faible de ses mailles.

Il s’ensuit une incapacité à répondre à la surenchère des gouvernements, au chapitre de leurs attentes de services, malgré la MMP. L’approche quantitative, issue de l’orientation électorale, prime trop souvent lors de l’adoption des instruments de mesure de la performance, sans doute à cause de la précipitation des gouvernements à vouloir justifier leurs choix politiques. L’approche qualitative, issue de l’orientation clients, vers laquelle on semble revenir aujourd’hui dans maints pays, s’en est trouvée longtemps négligée.

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Casson's Invariant for Oriented Homology Three-Spheres: An Exposition. (MN-36) (Mathematical Notes) by Selman Akbulut


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