tability and ocillations in delay differential equations of population dynamics : K. Gopalsamy, Kluwer, Dordrecht, 1992. 501 pp., Dfl.295, US$179, UK£103, ISBN 0-7923-1594-4.doi:10.1016/0378-4754(92)90089-YSDOSMathematics & Computers in Simulation...
t π 0 165 Download free eBooks at bookbo om Partial differential equations and operators Operators in Hilbert space 166 5. OPERATORS IN HILBERT SPACE ˚ ˚ If x “ x , then y “ y , and λ P σ pyq if and only if λ P σ pyq. The element x is positive in the sense that...