Klaus Schmitt

Generating author description...

All published works

Action	Title	Year	Authors
+	Bifurcation problems for second order systems	2020	Klaus Schmitt
+	Discrete resonance problems subject to periodic forcing	2019	Stephen Robinson Klaus Schmitt
+	On Parabolic Variational Inequalities with Multivalued Terms and Convex Functionals	2018	Vy Khoi Le Klaus Schmitt
+	On the existence of nontrivial solutions of differential equations subject to linear constraints	2017	Klaus Schmitt
+	On a Parabolic Variational Inequality Related to a Sandpile Problem	2013	Vy Khoi Le Klaus Schmitt
+	Nonlinear Elliptic Dirichlet and No-Flux Boundary Value Problems	2012	Loc H. Nguyen Klaus Schmitt
+	Bernstein–Nagumo conditions and solutions to nonlinear differential inequalities	2011	Nguyễn Hoàng Lộc Klaus Schmitt
+ PDF Chat	On second-order quadratic systems and algebras	2011	Art Sagle Klaus Schmitt
+	Applications of Sub-Supersolution Theorems to Singular Nonlinear Elliptic Problems	2011	Nguyễn Hoàng Lộc Klaus Schmitt
+	Fixed set theorems for discrete dynamics and nonlinear boundary-value problems	2011	Robert Brooks Klaus Schmitt Brandon Warner
+ PDF Chat	Boundary Value Problems for Singular Elliptic Equations	2011	Nguyễn Hoàng Lộc Klaus Schmitt
+ PDF Chat	On positive solutions of quasilinear elliptic equations	2009	Nguyễn Hoàng Lộc Klaus Schmitt
+ PDF Chat	contraction mapping principle and some applications	2009	Robert Brooks Klaus Schmitt
+	Revisiting the method of sub- and supersolutions for nonlinear elliptic problems	2007	Klaus Schmitt
+	Some general concepts of sub- and supersolutions for nonlinear elliptic problems	2006	Vy Khoi Le Klaus Schmitt
+	Variational Eigenvalues of Degenerate Eigenvalue Problems for the Weighted p-Laplacian	2005	An Lê Klaus Schmitt
+ PDF Chat	Ambrosetti-Prodi-type problems for quasilinear elliptic problems	2005	Eiko Koizumi Klaus Schmitt
+	Sub-supersolution theorems for quasilinear elliptic problems: A variational approach	2004	Vy Khoi Le Klaus Schmitt
+	On Generalized and Viscosity Solutions of Nonlinear Elliptic Equations	2004	David Hartenstine Klaus Schmitt
+	Periodic solutions of second order equations - a variational approach	2004	Klaus Schmitt
+	Radial Solutions of Quasilinear Elliptic Differential Equations	2004	Jon Jacobsen Klaus Schmitt
+	Nonlinear Analysis and Differential Equations An Introduction	2004	Klaus Schmitt
+ PDF Chat	Bifurcation problems associated with generalized Laplacians	2004	Klaus Schmitt Inbo Sim
+ PDF Chat	VARIATIONAL INEQUALITIES OF ELLIPTIC AND PARABOLIC TYPE	2002	Matthew Rudd Klaus Schmitt
+	The Liouville–Bratu–Gelfand Problem for Radial Operators	2002	Jon Jacobsen Klaus Schmitt
+ PDF Chat	On the Existence of Nontrivial Solutions to Some Elliptic Variational Inequalities	2002	Vy Khoi Le Klaus Schmitt
+	On the existence of soliton solutions to quasilinear Schrödinger equations	2002	Markus Poppenberg Klaus Schmitt Zhi-Qiang Wang
+	TheLiouville^Bratu^GelfandProblemforRadialOperators	2002	Jon Jacobsen Klaus Schmitt
+	Quasilinear Elliptic Equations and Inequalities with Rapidly Growing Coefficients	2000	Vy Khoi Le Klaus Schmitt
+	Applications of variational identities to quasilinear elliptic differential equations	2000	Jeff S. McGough Klaus Schmitt
+	Mountain pass type solutions for quasilinear elliptic equations	2000	Ph. Cl�ment M. Garc�a-Huidobro R. Man�sevich Klaus Schmitt
+	On critical points for noncoercive functionals and subharmonic solutions of some Hamiltonian systems	2000	Klaus Schmitt Zhi-Qiang Wang
+	On principal eigenvalues for quasilinear elliptic differential operators: an Orlicz-Sobolev space setting	1999	Marta Garcı́a-Huidobro Vy Khoi Le Raúl Manásevich Klaus Schmitt
+	Positive radial solutions of quasilinear elliptic partial differential equations on a ball	1999	Marta Garcia Huidobro Raúl Manásevich Klaus Schmitt
+	On Radial Solutions of Quasilinear Boundary Value Problems	1999	D. D. Hai Klaus Schmitt
+	On Boundary Value Problems for Degenerate Quasilinear Elliptic Equations and Inequalities	1998	Vy Khoi Le Klaus Schmitt
+	Positive Solutions of Quasilinear Boundary Value Problems	1998	D. D. Hai Klaus Schmitt R. Shivaji
+	A multidimensional analogue of the Denjoy-Perron-Henstock-Kurzweil integral	1997	D. D. Ang Klaus Schmitt L. K. Vy
+ PDF Chat	Some bifurcation results for a class of $p$-Laplacian like operators	1997	Marta Garcı́a-Huidobro Raúl Manásevich Klaus Schmitt
+	Bifurcation in Hilbert Spaces	1997	Vy Khoi Le Klaus Schmitt
+	Positive Radial Solutions of Some Nonlinear Partial Differential Equations	1997	D. D. Hai Raúl Manásevich Klaus Schmitt
+	Bifurcation from Infinity in Hilbert Spaces	1997	Vy Khoi Le Klaus Schmitt
+	Some Auxiliary Results	1997	Vy Khoi Le Klaus Schmitt
+	Bifurcation from Infinity in Banach Spaces	1997	Vy Khoi Le Klaus Schmitt
+	On Principal Eigenvalues ofp-Laplacian-like Operators	1996	Marta Garcı́a-Huidobro Raúl Manásevich Klaus Schmitt
+	On the Number of Solutions of Boundary Value Problems Involving the P-Laplacian	1996	D. D. Hai Klaus Schmitt R. Shivaji
+ PDF Chat	On minimizing noncoercive functionals on weakly vlosed sets	1996	Vy Khoi Le Klaus Schmitt
+ PDF Chat	Minimization problems for noncoercive functionals subject to constraints. II.	1996	Vy Khoi Le Klaus Schmitt
+	Boundary Value Problems for Quasilinear Second Order Differential Equations	1996	Raúl Manásevich Klaus Schmitt
+	PERIODIC SOLUTIONS OF FUNCTIONAL DIFFERENTIAL EQUATIONS OF RETARDED AND NEUTRAL TYPES IN BANACH SPACES	1995	Le Hoan Hoa Klaus Schmitt
+ PDF Chat	Existence of nonnegative solutions for semilinear elliptic equations with subcritical exponents	1995	D. D. Hai Klaus Schmitt
+	Positive solutions of semilinear elliptic boundary value problems	1995	Klaus Schmitt
+ PDF Chat	Minimization problems for noncoercive functionals subject to constraints	1995	Khoi Le Vy Klaus Schmitt
+	On Quadratic Differential Equations	1994	Arthur A. Sagle Klaus Schmitt
+	Fixed Point Theorems of Krasnosel’skii Type In Locally Convex Spaces and Applications to Integral Equations	1994	Le Hoan Hoa Klaus Schmitt
+ PDF Chat	Existence of positive solutions for semilinear elliptic equations in annular domains	1994	D. D. Hai Klaus Schmitt
+	Boundary value problems for higher order nonlinear differential equations	1993	D. D. Hai Klaus Schmitt
+ PDF Chat	Existence and Uniqueness Results for Nonlinear Boundary Value Problems	1993	D. D. Hai Klaus Schmitt
+	Permanence and the dynamics of biological systems	1992	V. Hutson Klaus Schmitt
+	Asymptotic behavior of positive solution branches of elliptic problems with linear part at resonance	1992	Renate Schaaf Klaus Schmitt
+	P - Coercive Variational Inequalities and Unilateral Problems for von Karman's Equations	1992	D. D. Ang Klaus Schmitt L. K. Vy
+	Almost Periodic Solutions of Nonlinear Second Order Differential Equations	1992	Klaus Schmitt James Ward
+	Asymptotics for Solution Branches Of Semilinear Elliptic Problems At Resonance	1992	Renate Schaaf Klaus Schmitt
+ PDF Chat	On bifurcation from infinity for potential operators	1991	Klaus Schmitt Zhiqiang Wang
+ PDF Chat	Period perturbations of linear problems at resonance on convex domains	1990	Renate Schaaf Klaus Schmitt
+ PDF Chat	Nonlinear eigenvalue problems with the parameter near resonance	1990	Jean Mawhin Klaus Schmitt
+	Symmetry Breaking in Semilinear Elliptic Problems	1990	Willi Jäger Klaus Schmitt
+	Noncoercive variational inequalities: some applications	1990	D. D. Ang Klaus Schmitt L. K. Vy
+	Global Aspects of the Continuous and Discrete Newton Method: A Case Study	1989	Heinz‐Otto Peitgen Michael Prüfer Klaus Schmitt
+	Oscillatory Perturbations of Linear Problems at Resonance	1988	David G. Costa Hansgeorg Jeggle Renate Schaaf Klaus Schmitt
+	Landesman-Lazer Type Problems At An Eigenvalue Of Odd Multiplicity	1988	Jean Mawhin Klaus Schmitt
+ PDF Chat	On the geometry of level sets of positive solutions of semilinear elliptic equations	1988	Chris Cosner Klaus Schmitt
+ PDF Chat	A Class of Nonlinear Sturm-Liouville Problems With Infinitely Many Solutions	1988	Renate Schaaf Klaus Schmitt
+ PDF Chat	Periodic solutions of systems of ordinary differential equations which approximate delay equations	1988	Franz Kappel Klaus Schmitt
+ PDF Chat	A class of nonlinear Sturm-Liouville problems with infinitely many solutions	1988	Renate Schaaf Klaus Schmitt
+ PDF Chat	On radial solutions of some semilinear elliptic equations	1988	Lynn Erbe Klaus Schmitt
+	Global aspects of the continuous and discrete Newton method: A case study	1988	Heinz‐Otto Peitgen M. Pr�fer Klaus Schmitt
+	On solvability of boundary value problems for systems of differential equations	1987	Lynn Erbe Klaus Schmitt
+	Geometric properties and bounds for positive solutions of semilinear elliptic equations	1987	Klaus Schmitt
+ PDF Chat	On positive solutions of semilinear elliptic equations	1987	E. N. Dancer Klaus Schmitt
+	Persistence in models of predator-prey populations with diffusion	1986	Steven R. Dunbar Krzysztof P. Rybakowski Klaus Schmitt
+ PDF Chat	Boundary value problems with jumping nonlinearities	1986	Klaus Schmitt
+	On the Eigenvalue Problem for Coupled Elliptic Systems	1986	Robert Stephen Cantrell Klaus Schmitt
+ PDF Chat	A Priori Bounds for Positive Solutions of a Semilinear Elliptic Equation	1985	Chris Cosner Klaus Schmitt
+ PDF Chat	A priori bounds for positive solutions of a semilinear elliptic equation	1985	Chris Cosner Klaus Schmitt
+	Corrigendum: Upper and lower solutions and semilinear second order elliptic equations with non-linear boundary conditions	1985	Jean Mawhin Klaus Schmitt
+ PDF Chat	Periodic solutions of a class of nonlinear evolution equations	1984	A. Schiaffino Klaus Schmitt
+ PDF Chat	Global Analysis of Two-Parameter Elliptic Eigenvalue Problems	1984	H. O. Peitgen Klaus Schmitt
+ PDF Chat	Global analysis of two-parameter elliptic eigenvalue problems	1984	Heinz‐Otto Peitgen Klaus Schmitt
+	Upper and lower solutions and semilinear second order elliptic equations with non-linear boundary conditions	1984	Jean Mawhin Klaus Schmitt
+	Nonlinear boundary value problems for systems of differential equations	1983	Patrick Habets Klaus Schmitt
+	Non-linear Boundary-value-problems for Systems of Differential-equations	1983	Patrick Habets Klaus Schmitt
+	Global topological perturbations of nonlinear elliptic eigenvalue problems	1983	Heinz‐Otto Peitgen Klaus Schmitt Klaus Kirchgässner
+ PDF Chat	Fredholm alternatives for nonlinear differential equations	1982	Klaus Schmitt Hal L. Smith
+ PDF Chat	Nonlinear elliptic boundary value problems versus their finite difference approximations: numerically irrelevant solutions.	1981	Heinz‐Otto Peitgen Dietmar Saupe Klaus Schmitt
+	Positive and spurious solutions of nonlinear eigenvalue problems	1981	Heinz‐Otto Peitgen Klaus Schmitt
+	Periodic solutions of some nonlinear delay-differential equations	1980	Mario Martelli Klaus Schmitt Hal L. Smith
+	BIFURCATION RESULTS FOR EQUATIONS WITH NONDIFFERENTIABLE NONLINEARITIES	1980	Klaus Schmitt
+	On eigenvalue problems for nondifferentiable mappings	1979	Klaus Schmitt Hal L. Smith
+ PDF Chat	On the existence of maximal and minimal solutions for parabolic partial differential equations	1979	J. Bebernes Klaus Schmitt
+	Periodic solutions of delay-differential equations	1979	Klaus Schmitt
+	Periodic solutions of a forced nonlinear oscillator involving a onesided restoring force	1978	Klaus Schmitt
+	Existence of solutions of a nonlinear boundary value problem via the method of lines	1978	Klaus Schmitt Roger C. Thompson Wolfgang Walter
+	Boundary value problems for quasilinear second order elliptic equations	1978	Klaus Schmitt
+ PDF Chat	On the boundary value problem 𝑢”+𝑢=𝛼𝑢⁻+𝑝(𝑡), 𝑢(0)=0=𝑢(𝜋)	1978	L. Aguinaldo Klaus Schmitt
+	On the Boundary Value Problem u � � + u = αu - + p(t), u(0) = 0 = u(π)	1978	L. Aguinaldo Klaus Schmitt
+	Positive solutions and conjugate points for systems of differential equations	1978	Klaus Schmitt Hal L. Smith
+ PDF Chat	Invariant sets and the hokohara-kneser property for systems of parabolic partial differential equations	1977	J. Bebernes Klaus Schmitt
+	Boundary Value Problems and Periodic Solutions of Nonlinear Ordinary, Functional and Partial Differential Equations	1977	Klaus Schmitt
+	Rothe and altman type coincidence theorems and applications to differential equations	1977	Jean Mawhin Klaus Schmitt
+	Non-linear boundary value problems for systems of differential equations†	1977	H. W. Knobloch Klaus Schmitt
+	Existence of solutions of non-linear Schrödinger equations	1977	Klaus Schmitt Long-Yi Tsai Long-Yi Tsai
+ PDF Chat	Boundary value problems for second order differential equations in convex subsets of a Banach space	1976	Klaus Schmitt Peter Volkmann
+	Boundary value problems for infinite systems of second-order differential equations	1975	Klaus Schmitt Russell G. Thompson‬‬
+	Applications of variational equations to ordinary and partial differential equations—Multiple solutions of boundary value problems	1975	Klaus Schmitt
+	Eigenvalue problems for nonlinear second order differential equations	1975	Klaus Schmitt
+	Boundary Value Problems and Comparison Theorems for Ordinary Differential Equations	1974	Klaus Schmitt
+	Existence and multiplicity of solutions of some nonlinear equations	1974	Klaus Schmitt
+ PDF Chat	A note on periodic solutions for delay-differential systems	1974	G. B. Gustafson Klaus Schmitt
+	Periodic solutions of hereditary differential systems	1973	G. B. Gustafson Klaus Schmitt
+ PDF Chat	Pointwise completeness of differential-difference equations	1973	Robert Brooks Klaus Schmitt
+	Periodic boundary value problems for systems of second order differential equations	1973	J. Bebernes Klaus Schmitt
+	Periodic solutions of nonlinear differential systems	1972	Klaus Schmitt
+	Nonzero solutions of boundary value problems for second order ordinary and delay-differential equations	1972	G. B. Gustafson Klaus Schmitt
+ PDF Chat	Periodic solutions of small period of systems of $n$th order differential equations	1972	Klaus Schmitt
+	Periodic solutions of systems of second-order differential equations	1972	Klaus Schmitt
+	Periodic solutions of nonlinear differential systems	1972	Klaus Schmitt
+	An application of the shooting method to boundary value problems for second order delay equations	1971	K. de Nevers Klaus Schmitt
+	A Note on Periodic Solutions of Second Order Ordinary Differential Equations	1971	Klaus Schmitt
+ PDF Chat	Comparison theorems for second order delay differential equations	1971	Klaus Schmitt
+	Periodic solutions of linear second order differential equations with deviating argument	1970	Klaus Schmitt
+	A nonlinear boundary value problem	1970	Klaus Schmitt
+	Boundary value problems for differential equations with deviating arguments	1970	L. J. Grimm Klaus Schmitt
+	On Solutions of Nonlinear Differential Equations with Deviating Arguments	1969	Klaus Schmitt
+	Boundary value problems for differential equations with deviating arguments	1969	L. J. Grimm Klaus Schmitt
+	Bounded solutions of nonlinear second order differential equations	1969	Klaus Schmitt
+	On the global existence of solutions of second order ordinary differential equations	1969	Klaus Schmitt
+	Boundary value problems for nonlinear second order differential equations	1968	Klaus Schmitt
+ PDF Chat	Boundary value problems for delay-differential equations	1968	L. J. Grimm Klaus Schmitt
+	SOLUTIONS TO BOUNDARY VALUE PROBLEMS AND PERIODIC SOLUTIONS OF SECOND-ORDER NONLINEAR DIFFERENTIAL EQUATIONS	1967	Klaus Schmitt
+	Periodic solutions of nonlinear second order differential equations	1967	Klaus Schmitt

Common Coauthors

Coauthor	Papers Together
Vy Khoi Le	14
D. D. Hai	8
Renate Schaaf	6
Heinz‐Otto Peitgen	6
Raúl Manásevich	6
Jean Mawhin	5
Hal L. Smith	4
Jon Jacobsen	3
L. K. Vy	3
Nguyễn Hoàng Lộc	3
Chris Cosner	3
G. B. Gustafson	3
J. Bebernes	3
Marta Garcı́a-Huidobro	3
D. D. Ang	3
Robert Brooks	3
L. J. Grimm	3
Lynn Erbe	2
Zhi-Qiang Wang	2
Patrick Habets	2
R. Shivaji	2
Le Hoan Hoa	2
L. Aguinaldo	2
Long-Yi Tsai Long-Yi Tsai	1
V. Hutson	1
An Lê	1
Stephen Robinson	1
James Ward	1
Franz Kappel	1
Loc H. Nguyen	1
Willi Jäger	1
M. García-Huidobro	1
Ph. Clément	1
Khoi Le Vy	1
Mario Martelli	1
Roger C. Thompson	1
Arthur A. Sagle	1
Wolfgang Walter	1
Art Sagle	1
Robert Stephen Cantrell	1
Marta Garcia Huidobro	1
R. Mansevich	1
Steven R. Dunbar	1
Brandon Warner	1
Klaus Kirchgässner	1
Dietmar Saupe	1
E. N. Dancer	1
Nguyễn Hoàng Lộc	1
David G. Costa	1
Hansgeorg Jeggle	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	Ordinary Differential Equations	2002	Philip Hartman	20
+	Periodic solutions of nonlinear second order differential equations	1967	Klaus Schmitt	16
+ PDF Chat	Partial Differential Equations	1988	Shiing-Shen Chern	15
+	Boundary value problems for quasilinear second order elliptic equations	1978	Klaus Schmitt	15
+ PDF Chat	Elliptic Partial Differential Equations of Second Order	2001	David Gilbarg Neil S. Trudinger	14
+	On bifurcation from infinity	1973	Paul H. Rabinowitz	13
+	Topological Methods in the Theory of Nonlinear Integral Equations.	1968	E. H. Rothe M. A. Krasnosel’skii A. H. Armstrong J. Burlak	13
+ PDF Chat	Symmetry and related properties via the maximum principle	1979	Basilis Gidas Wei‐Ming Ni Louis Nirenberg	11
+	Isoperimetric inequalities and applications	1980	Catherine Bandle	11
+ PDF Chat	Some aspects of nonlinear eigenvalue problems	1973	Paul H. Rabinowitz	11
+ PDF Chat	Elliptic Partial Differential Equations of Second Order	1977	David Gilbarg Neil S. Trudinger	10
+	Periodic boundary value problems for systems of second order differential equations	1973	J. Bebernes Klaus Schmitt	10
+	On Boundary Value Problems for Degenerate Quasilinear Elliptic Equations and Inequalities	1998	Vy Khoi Le Klaus Schmitt	10
+ PDF Chat	Nonlinear Functional Analysis	1970	Felix E. Browder	9
+	Nonzero solutions of boundary value problems for second order ordinary and delay-differential equations	1972	G. B. Gustafson Klaus Schmitt	9
+	Periodic solutions of systems of second-order differential equations	1972	Klaus Schmitt	9
+	Boundary value problems for infinite systems of second-order differential equations	1975	Klaus Schmitt Russell G. Thompson‬‬	9
+	Nonlinear Functional Analysis	1985	Klaus Deimling	9
+	Some global results for nonlinear eigenvalue problems	1971	Paul H. Rabinowitz	9
+	Fixed Point Equations and Nonlinear Eigenvalue Problems in Ordered Banach Spaces	1976	Herbert Amann	8
+	On the existence of periodic solutions for second order vector differential equations	1970	H. W. Knobloch	8
+	Nonlinear Functional Analysis and its Applications	1990	Eberhard Zeidler	8
+	Nonlinear Functional Analysis	1969	Jacob T. Schwartz	8
+ PDF Chat	Nonlinear elliptic boundary value problems versus their finite difference approximations: numerically irrelevant solutions.	1981	Heinz‐Otto Peitgen Dietmar Saupe Klaus Schmitt	8
+	On the Existence of Positive Solutions for a Class of Semilinear Elliptic Boundary Value Problems	1979	K. J. Brown Harun Budin	8
+ PDF Chat	Global analysis of two-parameter elliptic eigenvalue problems	1984	Heinz‐Otto Peitgen Klaus Schmitt	8
+ PDF Chat	A class of nonlinear Sturm-Liouville problems with infinitely many solutions	1988	Renate Schaaf Klaus Schmitt	8
+	Ordinary Differential Equations.	1965	Courtney Coleman Morris Tenenbaum Harry Pollard	7
+	Boundary value problems for differential equations with deviating arguments	1970	L. J. Grimm Klaus Schmitt	7
+	On multiple positive solutions of nonlinear elliptic eigenvalue problems	1981	Peter Heß	7
+	Nonlinear boundary value problems for second order differential equations	1970	Lynn Erbe	6
+ PDF Chat	Existence of positive solutions for semilinear elliptic equations in annular domains	1994	D. D. Hai Klaus Schmitt	6
+	Periodic solutions of hereditary differential systems	1973	G. B. Gustafson Klaus Schmitt	6
+	On eigenvalue problems for nondifferentiable mappings	1979	Klaus Schmitt Hal L. Smith	6
+	Positive solutions of asymptotically linear elliptic eigenvalue problems	1980	Antonio Ambrosetti P. Hess	6
+ PDF Chat	On boundary value problems for systems of ordinary, nonlinear, second order differential equations	1960	Philip Hartman	6
+	Comparison theorems for nonlinear differential equations	1967	Lloyd Jackson Keith Schrader	6
+	Existence of periodic solutions for higher-order differential systems that are not of class D	1970	Jean Mawhin	6
+	Nonlinear Potential Theory of Degenerate Elliptic Equations	2018	Juha Heinonen Tero Kilpeläinen Олли Мартио	6
+	Positive Radial Solutions of Some Nonlinear Partial Differential Equations	1997	D. D. Hai Raúl Manásevich Klaus Schmitt	6
+	A boundary value problem with a periodic nonlinearity	1986	James Ward	6
+	Global topological perturbations of nonlinear elliptic eigenvalue problems	1983	Heinz‐Otto Peitgen Klaus Schmitt Klaus Kirchgässner	6
+	Subfunctions and second-order ordinary differential inequalities	1968	Lloyd Jackson	6
+	Global bifurcation from the eigenvalues of the p-Laplacian	1991	Manuel del Pino Raúl Manásevich	6
+	On the solvability of some elliptic partial differential equations with the linear part at resonance	1986	Sergio Solimini	6
+	Bifurcation from simple eigenvalues	1971	Michael G. Crandall Paul H. Rabinowitz	5
+ PDF Chat	A note on periodic solutions of second order differential equations without damping	1959	George Seifert	5
+	Concave solutions of singular non-linear differential equations	1974	C. A. Stuart	5
+	Maximum Principles in Differential Equations	1984	Murray H. Protter Hans F. Weinberger	5
+ PDF Chat	Boundary value problems for delay-differential equations	1968	L. J. Grimm Klaus Schmitt	5