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1.
Tarek M. A. El-Mistikawy 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》2011,62(6):1159-1164
In their article (Fundamental flows with nonlinear slip conditions: exact solutions, R. Ellahi, T. Hayat, F. M. Mahomed and A. Zeeshan, Z. Angew. Math. Phys. 61 (2010) 877–888.), the authors considered three simple cases of the steady flow of a third grade fluid between parallel plates with slip conditions; namely, Couette flow, Poiseuille flow, and generalized Couette flow. They obtained exact solutions, which were utilized in a way that did not lead to useful results. Their conclusion that the Couette flow cannot be obtained from the generalized Couette flow, by dropping the pressure gradient, is incorrect. Meaningful results based on their solution are herein presented. 相似文献
2.
Tarek M. A. El-Mistikawy 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》2011,24(1):1159-1164
In their article (Fundamental flows with nonlinear slip conditions: exact solutions, R. Ellahi, T. Hayat, F. M. Mahomed and
A. Zeeshan, Z. Angew. Math. Phys. 61 (2010) 877–888.), the authors considered three simple cases of the steady flow of a third grade fluid between parallel plates with
slip conditions; namely, Couette flow, Poiseuille flow, and generalized Couette flow. They obtained exact solutions, which
were utilized in a way that did not lead to useful results. Their conclusion that the Couette flow cannot be obtained from
the generalized Couette flow, by dropping the pressure gradient, is incorrect. Meaningful results based on their solution
are herein presented. 相似文献
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4.
Maher Berzig 《Journal of Applied Mathematics and Computing》2013,41(1-2):501-503
We show that the perturbation estimate for the matrix equation X?A ? X q A=Q (0<q<1), due to G. Jia and D. Cao, published in this journal, is wrong. 相似文献
5.
《European Journal of Operational Research》2002,136(2):466-467
This paper comments on the paper by Bojanic et al. (1998) in this Journal. 相似文献
6.
《Historia Mathematica》1988,15(2):179-181
7.
《Optimization》2012,61(4):431-432
We consider a special class of optimization problems that we call a Mathematical Programme with Vanishing Constraints. It has a number of important applications in structural and topology optimization, but typically does not satisfy standard constraint qualifications like the linear independence and the Mangasarian–Fromovitz constraint qualification. We therefore investigate the Abadie and Guignard constraint qualifications in more detail. In particular, it follows from our results that also the Abadie constraint qualification is typically not satisfied, whereas the Guignard constraint qualification holds under fairly mild assumptions for our particular class of optimization problems. 相似文献