1,351 research outputs found
Criterion for polynomial solutions to a class of linear differential equations of second order
No full textPT: JSource type: Electronic(1
Solutions for certain classes of the Riccati differential equation
No full textWe derive some analytic closed-form solutions for a class of Riccati equations y'(x) - lambda(0)(x) y(x) +/- y(2)(x) = +/- s(0)(x) where lambda(0)( x), s(0)( x) are C-infinity- functions. We show that if delta(n) = lambda(n)s(n-1) - lambda(n-1)s(n) = 0, where lambda(n) = lambda(')(n-1) + s(n-1) + lambda(0)lambda(n-1) and s(n) = s(n-1)(')+ s(0)lambda(k-1) , n = 1, 2, ... , then the Riccati equation has a solution given by y( x) = -/+ s(n-1)(x)/ lambda(n-1)(x). Extension to the generalized Riccati equation y'(x) + P(x) y(x) + Q(x) y(2)(x) = R(x) is also investigated
Grave of Gamal Abdel Nasser
No full textCairo: Egyptian War Minister Mohammed Sadek (L) and Chief of Staff Maj. Gen. Saad El Shazli come to attention after placing a wreath at the grave of Gamal Abdel Nasser here 7/23. The date marked 20th anniversary of Nasser\u27s assumption of power in Egypt.https://digitalcommons.chapman.edu/upi_arab_israeli_conflict/1028/thumbnail.jp
Commentary on Bamat et al
No full textSaad, ED (corresponding author), Int Inst Drug Dev, Ave Prov 3, Louvain La Neuve, Belgium.
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Improved fisheries productivity and management in tropical reservoirs
No full textThe objective of the project was to contribute to the current research on reservoirs enhancement fisheries in tropical countries through the implementation of a series of action-research activities implemented in two small reservoirs in the Indo-Gangetic basin in India, and two very large reservoirs in Africa, the Lake Nasser (Egypt), and the Volta Lake (Ghana). Socio-institutional analyses were also conducted in these reservoirs to improve our knowledge regarding some of the main social processes that influence reservoir productivity. Overall the results of the project stress that while the natural biophysical constraints of the reservoirs are important in defining the ecological production processes, it is the socio-economic settings characterizing the community/societies around the reservoirs that eventually shape the human production enhancement possibilities.Reservoir fisheries, Inland fisheries, Sociological aspects, Socioeconomic aspects, Africa, Nasser L., Ghana, Volta L.,
A discrete and q asymptotic iteration method
No full textWe introduce a finite difference and q-difference analogues of the Asymptotic Iteration Method of Ciftci, Hall, and Saad. We give necessary, and sufficient condition for the existence of a polynomial solution to a general linear second-order difference or q-difference equation subject to a ‘terminating condition’, which is precisely defined. When a difference or q-difference equation has a polynomial solution, we show how to find the second solution.Natural Sciences and Engineering Research Council of Canad
Matrix elements for a generalized spiked harmonic oscillator
No full textPT: JSource type: Electronic(1
Perturbation expansions for a class of singular potentials
No full textPT: JSource type: Electronic(1
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