Ce livre traite des structures à bornes, des fonctions temporelles, du spectre de Waelbroeck, et du calcul symbolique. Il explore les fonctions spectrales, les ensembles spectraux d'une sous-algèbre, ainsi que l'extension des espaces de Hardy et l'approximation des fonctions holomorphes sur des ouverts bornés.
The book is a reprint of a classic work first published in 1859, offering readers a chance to explore its historical significance and enduring themes. It captures the essence of its time, reflecting the social and cultural context of the era. The narrative is likely rich with insights and character development, making it a valuable addition for those interested in literature from that period. This edition aims to preserve the original's authenticity while making it accessible to contemporary audiences.