Ball, J. M. Strongly continuous semigroups, weak solutions, and the variation of constants formula. (English) Zbl 0353.47017 Proc. Am. Math. Soc. 63, 370-373 (1977). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 137 Documents MSC: 47D03 Groups and semigroups of linear operators 47E05 General theory of ordinary differential operators 34G99 Differential equations in abstract spaces 35D05 Existence of generalized solutions of PDE (MSC2000) 35K99 Parabolic equations and parabolic systems PDFBibTeX XMLCite \textit{J. M. Ball}, Proc. Am. Math. Soc. 63, 370--373 (1977; Zbl 0353.47017) Full Text: DOI