scholarly journals Infinite horizon cancer treatment model with isoperimetrical constraint: existence of optimal solutions and numerical analysis

2018 ◽  
Vol 92 (6) ◽  
pp. 1401-1414
Author(s):  
Dieter Grass ◽  
Valeriya Lykina
2019 ◽  
Vol 27 (02) ◽  
pp. 257-279
Author(s):  
P. D. N. SRINIVASU ◽  
SIMON D. ZAWKA

This study is concerned with harvesting a renewable resource that is surviving in a polluted environment. Fall in the revenue from the resource due to presence of pollution in the environment drives the sole owner to allocate a part of the available effort towards treating the environment and the interest is to find the optimal allocation of the available effort towards harvesting the resource and treating the environment so that the revenue is maximized. Resource-pollution dynamics are studied, maximum sustainable yield and maximum sustainable revenue have been evaluated. Further, an optimal allocation problem has been formulated on infinite horizon and optimal solutions are obtained. Key results of the study are demonstrated through numerical illustrations.


2013 ◽  
Vol 4 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Paul Zarogoulidis ◽  
Georgia Trakada ◽  
Konstantinos Zarogoulidis

Mathematics ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 569
Author(s):  
Wu

The numerical method for solving the fuzzy linear programming problems with fuzzydecision variables is proposed in this paper. The difficulty for solving this kind of problem is thatthe decision variables are assumed to be nonnegative fuzzy numbers instead of nonnegative realnumbers. In other words, the decision variables are assumed to be membership functions. One of thepurposes of this paper is to derive the analytic formula of error estimation regarding the approximateoptimal solution. On the other hand, the existence of optimal solutions is also studied in this paper.Finally we present two numerical examples to demonstrate the usefulness of the numerical method.


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