On nonnegative solutions of matrix equationsVICTORY, H. D. JR.SIAM journal on algebraic and discrete methods. 1985, Vol 6, Num 3, pp 406-412, issn 0196-5212Article

BLOW-UP OF SOLUTIONS OF NONLINEAR PARABOLIC INEQUALITIESTALIAFERRO, Steven D.Transactions of the American Mathematical Society. 2009, Vol 361, Num 6, pp 3289-3302, issn 0002-9947, 14 p.Article

A backward Harnack inequality and Fatou theorem for nonnegative solutions of parabolic equationsFABES, E. B; GAROFALO, N; SALSA, S et al.Illinois journal of mathematics. 1986, Vol 30, Num 4, pp 536-565, issn 0019-2082Article

A parametrization of the nonnegative definite solutions of the algebraic Riccati equationD'ALESSANDRO, D.Automatica (Oxford). 1998, Vol 34, Num 3, pp 385-388, issn 0005-1098Article

The heat equation with a singular potentialBARAS, P; GOLDSTEIN, J. A.Transactions of the American Mathematical Society. 1984, Vol 284, Num 1, pp 121-139, issn 0002-9947Article

A degenerate diffusion problem not in divergence formDAL PASSO, R; LUCKHAUS, S.Journal of differential equations (Print). 1987, Vol 69, Num 1, pp 1-14, issn 0022-0396Article

Boundary blow-up solutions of cooperative systemsDAVILA, Juan; DUPAIGNE, Louis; GOUBET, Olivier et al.Annales de l'Institut Henri Poincaré. Analyse non linéaire. 2009, Vol 26, Num 5, pp 1767-1791, issn 0294-1449, 25 p.Article

Gradient and Holder estimates for positive solutions of Pucci type equationsCAPUZZO DOLCETTA, Italo; VITOLO, Antonio.Comptes rendus. Mathématique. 2008, Vol 346, Num 9-10, pp 527-532, issn 1631-073X, 6 p.Article

An algorithm for non-negative least error minimal norm solutionsNIKOLOPOULOS, P. V; SREEDHARAN, V. P.Numerical functional analysis and optimization. 1996, Vol 17, Num 3-4, pp 419-436, issn 0163-0563Article

On nonexistence of similarity solutionsPELETIER, L. A; TROY, W. C.Journal of mathematical analysis and applications. 1988, Vol 133, Num 1, pp 57-67, issn 0022-247XArticle

ON THE REPRESENTATION OF NON-NEGATIVE SOLUTIONS OF LINEAR PARABOLIC SYSTEMS OF PARTIAL DIFFERENTIAL EQUATIONSCHABROWSKI J.1973; ANN. POLON. MATH.; POLOGNE; DA. 1973; VOL. 28; NO 1; PP. 11-16; BIBL. 5 REF.Serial Issue

Existence and Uniqueness of Nonnegative Solutions to The Stochastic Porous Media EquationBARBU, Viorel; DA PRATO, Giuseppe; RÖCKNER, Michael et al.Indiana University mathematics journal. 2008, Vol 57, Num 1, pp 187-211, issn 0022-2518, 25 p.Article

Comparison theorems for elliptic inequalities with a non-linearity in the principal partKON'KOV, Andrej A.Journal of mathematical analysis and applications. 2007, Vol 325, Num 2, pp 1013-1041, issn 0022-247X, 29 p.Article

Unique continuation for nonnegative Solutions of Schrödinger type inequalitiesDE CARLI, L; HUDSON, S.Journal of mathematical analysis and applications. 2006, Vol 318, Num 2, pp 467-471, issn 0022-247X, 5 p.Article

New convergence results on functional iteration techniques for the numerical solution of M/G/1 type Markov chainsMEINI, B.Numerische Mathematik. 1997, Vol 78, Num 1, pp 39-58, issn 0029-599XArticle

Existence of nonnegative solutions of a semilinear equation at resonance with linear growthSANTANILLA, J.Proceedings of the American Mathematical Society. 1989, Vol 105, Num 4, pp 963-971, issn 0002-9939Article

A porous media equation with absorption. I. Long time behaviourMINKYU KWAK.Journal of mathematical analysis and applications. 1998, Vol 223, Num 1, pp 96-110, issn 0022-247XArticle

On the existence of nonnegative continuous solutions of the Cahn-Hilliard equationYIN JINGXUE.Journal of differential equations (Print). 1992, Vol 97, Num 2, pp 310-327, issn 0022-0396Article

Régularité des solutions positives de l'équation parabolique p-laplacienne = Regularity of nonnegative solutions of the p-Laplacian parabolic equationESTEBAN, J. R; VAZQUEZ, J. L.Comptes rendus de l'Académie des sciences. Série 1, Mathématique. 1990, Vol 310, Num 3, pp 105-110, issn 0764-4442Article

A Farkas-type theorem for linear interval equationsROHN, J.Computing (Wien. Print). 1989, Vol 43, Num 1, pp 93-95, issn 0010-485XArticle

Instability of nonnegative solutions for a class of semipositone problemsBROWN, K. J; SHIVAJI, R.Proceedings of the American Mathematical Society. 1991, Vol 112, Num 1, pp 121-124, issn 0002-9939Article

On the self-similar solutions of the broadwell model for a discrete velocity gasGOLSE, F.Communications in partial differential equations. 1987, Vol 12, Num 3, pp 315-326, issn 0360-5302Article

Nonnegative radial solutions to a class of elliptic equations involving the Pucci's extremal operatorWEI LI; JIANGANG CHENG.Journal of mathematical analysis and applications. 2008, Vol 341, Num 1, pp 386-397, issn 0022-247X, 12 p.Article

Instability of nonnegative solutions for a class of semi linear elliptic boundary value problemsMAYA, C; SHIVAJI, R.Journal of computational and applied mathematics. 1998, Vol 88, Num 1, pp 125-128, issn 0377-0427Article

Asymptotic behaviour of solutions of u_t=Δu^m-u^p as p→∞KIN MING HUI.Nonlinear analysis. 1993, Vol 21, Num 3, pp 191-195, issn 0362-546XArticle