W. Petryshyn

发表

Construction of fixed points of demicompact mappings in Hilbert space

W. Petryshyn, 1966 .

Direct and iterative methods for the solution of linear operator equations in Hilbert space

W. Petryshyn, IN Hilbert SPACEi, 1962 .

On the eigenvalue problem Tu-λSu=0 with unbounded and nonsymetric operators T and S

W. Petryshyn, 1968, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

On a class of K-p.d. and non-K-p.d. operators and operator equations

W. Petryshyn, 1965 .

Construction of fixed points of nonlinear mappings in Hilbert space

F. Browder, W. Petryshyn, W. V. Petryshyn, 1967 .

Approximation methods and the generalized topological degree for nonlinear mappings in Banach spaces

Felix E. Browder, F. Browder, W. Petryshyn, 1969 .

The solution by iteration of nonlinear functional equations in Banach spaces

F. Browder, W. Petryshyn, W. V. Petryshyn, 1966 .

Strong and weak convergence of the sequence of successive approximations for quasi-nonexpansive mappings

W. Petryshyn, T. E. Williamson, W. V Petryshyn, 1973 .

Existence theorems for higher order nonlinear periodic boundary value problems

W. Petryshyn, W. V. Petryshyn, Z. S. Yu, 1982 .

On the approximation-solvability of nonlinear equations

W. Petryshyn, 1968 .

Remarks on the approximation-solvability of nonlinear functional equations

W. Petryshyn, 1967 .

The Generalized Overrelaxation Method for the Approximate Solution of Operator Equations in Hilbert Space

W. Petryshyn, 1962 .

Galerkin methods in the constructive solvability of nonlinear Hammerstein equations with applications to differential equations

W. Petryshyn, P. Fitzpatrick, 1978 .

Some further results on periodic solutions of certain higher order nonlinear differential equations

W. Petryshyn, 1984 .

The topological degree and Galerkin approximations for noncompact operators in Banach spaces

F. Browder, W. Petryshyn, 1968 .

A degree theory, fixed point theorems, and mapping theorems for multivalued noncompact mappings

W. Petryshyn, P. Fitzpatrick, W. V. Petryshyn, 1974 .

On generalized inverses and on the uniform convergence of (I − βK)n with application to iterative methods

W. Petryshyn, W. V Petryshyn, 1967 .

Bifurcation and asymptotic bifurcation for equations involving A-proper mappings with applications to differential equations

W. Petryshyn, 1978 .

On the solvability of an equation describing the periodic motions of a satellite in its elliptic orbit

W. Petryshyn, Z. Yu, 1985 .

Periodic solutions of certain higher order nonlinear differential equations

W. Petryshyn, Z. Yu, 1983 .

Using degree theory for densely defined A-proper maps in the solvability of semilinear equations with unbounded and noninvertible linear part

W. Petryshyn, 1980 .

Fredholm theory for abstract and differential equations with noncompact nonlinear perturbations of Fredholm maps

W. Petryshyn, 1979 .

Boundary value problems at resonance for certain semilinear ordinary differential equations

W. Petryshyn, Z. Yu, 1984 .

Solvability of Neumann BV problems for nonlinear second-order ODEs which need not be solvable for the highest-order derivative

W. Petryshyn, Z. Yu, 1983 .

Periodic solutions of nonlinear second-order differential equations which are not solvable for the highest derivative

W. Petryshyn, Z. Yu, 1982 .

On the solvability of x∈Tx+λFx in quasinormal cones with T and F k-set-contractive

W. Petryshyn, W. V. Petryshyn, 1981 .

Structure of the fixed points sets of k-set-contractions

W. Petryshyn, 1971 .

A characterization of strict convexity of banach spaces and other uses of duality mappings

W. Petryshyn, W. V Petryshyn, 1970 .

Some applications of A-proper mappings

W. Petryshyn, P. Fitzpatrick, 1979 .

Fredholm alternative for nonlinear k-ball-contractive mappings with applications

W. Petryshyn, 1975 .

On a general iterative method for the approximate solution of linear operator equations

W. Petryshyn, 1963 .

On the Eigenvalue Problem Tu - [lambda] Su = 0 With Unbounded and Nonsymmetric Operators T and S

W. Petryshyn, 2015 .

Fixed point theorems for multivalued noncompact acyclic mappings

Patrick Fitzpatrick, W. Petryshyn, P. Fitzpatrick, 1974 .

On the inversion of matrices and linear operators

W. Petryshyn, W. V. Petryshyn, 1965 .

On the extrapolated Jacobi or simultaneous displacements method in the solution of matrix and operator equations

W. Petryshyn, 1965 .

AND LINEAR OPERATORS

W. Petryshyn, 2016 .

Remarks on the generalized overrelaxation and the extrapolated Jacobi methods for operator equations in Hilbert space

W. Petryshyn, W. V Petryshyn, 1970 .

Constructional Proof of Lax-Milgram lemma and its Application to Non-K-P.D. Abstract and Differential Operator Equations

W. Petryshyn, 1965 .

On the iteration, projection and projection-iteration methods in the solution of nonlinear functional equations

W. Petryshyn, 1968 .

Fixed point theorems for semidifferentiable k-set-contractions in ordered Banach spaces

W. Petryshyn, 1988 .

Existence of nonzero fixed points for noncompact mappings in wedges and cones

W. Petryshyn, 1979 .

Positive Eigenvalues for Nonlinear Multivalued Noncompact Operators with Applications to Differential Operators

W. Petryshyn, P. Fitzpatrick, 1976 .

On nonlinear equations involving pseudo-A-proper mappings and their uniform limits with applications

W. Petryshyn, 1972 .

On nonlinear P-compact operators in Banach space with applications to constructive fixed-point theorems

W. Petryshyn, 1966 .

Fixed points and surjectivity theorems via the A-proper mapping theory with application to differential equations

W. Petryshyn, 1981 .

Solvability of Linear and Quasilinear Elliptic Boundary Value Problems via the A-Proper Mapping Theory

W. Petryshyn, 1980 .

New existence theorems for nonlinear equations of Hammerstein type.

W. Petryshyn, P. Fitzpatrick, 1971 .

On a fixed point theorem for nonlinear $P$-compact operators in Banach space

W. Petryshyn, BY W. V. Petryshyn, 1966 .

Extension of nonlinear densely defined operators, rates of convergence for the error and the residual, and application to differential equations

W. Petryshyn, E. Conjura, 1978 .

New positive point and eigenvalue results for P-compact maps and some applications

W. Petryshyn, Beatriz Lafferriere, 1989 .

Remarks on strict monotonicity and surjectivity properties of duality mappings defined on real normed linear spaces

W. Petryshyn, C. DePrima, 1971 .

Fixed-Point Theorems for Multivalued Noncompact Inward Maps

W. Petryshyn, P. Fitzpatrick, 1974 .