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Agostino Prástaro, Geometry of PDE's. IV. Navier-Stokes equation and integral bordism groups, JMAA, Volume 338, Issue 2, 15 February 2008, Pages 1140–1151.
http://www.sciencedirect.com/science/ar ... 7X07007810http://en.wikipedia.org/wiki/Talk:Navie ... smoothness :
NS Existence and Smoothness: An Algebraic Topologic Proof
Navier-Stokes problem has been completely solved in the following paper:
[1] A. Prástaro, Geometry of PDE's. IV: Navier-Stokes equation and integral bordism groups, J. Math. Anal. Appl. 338(2)(2008), 1140-1151. DOI: 10.1016/j.jmaa.2007.06.009. MR2386488(2009j:58028); Zbl 1135.35064]
For complementary results, see also the following References.
[2] A. Prástaro, Extended crystal PDE's, Mathematics Without Boundaries: Surveys in Pure Mathematics. (Eds. P. M. Pardalos and Th. M. Rassias.) Springer-Heidelberg New York Dordrecht London (2014), 415-481. DOI: 10.1007/978-1-4939-1106-6. arXiv: 0811.3693[math.AT].
The classification of global space-time weak, singular and smooth solutions, for any initial smooth conditions (vector-field, isobaric-pressure, temperature), for compact, 3-dimensional smooth compact domains, is given by means of suitable integral bordism groups of the Navier-Stokes equation, in the above quoted works. It may be useful to emphasize that global smooth solutions do not necessitate to be (average) asymptotic stable ones. (They are always stable at finite times.) A general geometric criterion to study such stability is also given in [1] and [2] and in the papers quoted below.
[3] A. Prástaro, (Un)stability and bordism groups in PDE's, Banach J. Math. Anal. 1(1)(2007), 139-147. MR2350203(2009e:58036); Zbl 1130.58014.
[4] A. Prástaro, Extended crystal PDE's stability.I: The general theory, Math. Comput. Modelling 49(9-10)(2009), 1759-1780. DOI: 10.1016/j.mcm.2008.07.020. MR2532085(2011b:58041); Zbl 1171.35322.
[5] A. Prástaro, Extended crystal PDE's stability.II: The extended crystal MHD-PDE's, Math. Comput. Modelling 49(9-10)(2009), 1781-1801. DOI: 10.1016/j.mcm.2008.07.021. MR2532086(2011b:58042); Zbl 1171.35323
[6] A. Prástaro, On the extended crystal PDE's stability.I: The n-d'Alembert extended crystal PDE's, Appl. Math. Comput. 204(1)(2008), 63-69. DOI: 10.1016/j.amc.2008.05.141. MR2458340(2010h:58058); Zbl 1161.35054.
[7] A. Prástaro, On the extended crystal PDE's stability.II: Entropy-regular-solutions in MHD-PDE's, Appl. Math. Comput. 204(1)(2008), 82-89. DOI: 10.1016/j.amc.2008.05.142. MR2458342(2010h:58059); Zbl 1161.35462.
More recently a new proof on the existence of smooth global solutions, defined on all R^3 is given in the following paper:
[8] A. Prástaro, The Maslov index in PDEs geometry. arXiv: 1503.07851.
(The geometric methods used are the same ones focused on the Prástaro's PDEs Algebraic Topology.)