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#### Fixed point theorems for nonlinear operators

(Elsevier BV, 1996-09-01)

#### Boundary value problems singular in the solution variable with nonlinear boundary data

(Cambridge University Press (CUP), 1996-10-01)

Existence results are established for the equation y '' +f(t, y) = 0, 0 < t < 1. Here f may be singular in y and f is allowed to change sign. Our boundary data include y(0) = y'(1) + ky(1) = 0, k > -1 and y(0) = ...

#### Nonresonant nonlinear singular problems in the limit circle case

(Elsevier BV, 1996-02-01)

#### Positive solutions for (p,n−p) conjugate boundary value problems

(Elsevier BV, 1998-12-01)

#### Twin solutions to singular dirichlet problems

(Elsevier BV, 1999-12-01)

#### Positive solutions to superlinear singular boundary value problems

(Elsevier BV, 1998-02-01)

#### Coincidence points for perturbations of linear fredholm maps of index zero

(European Mathematical Publishing House, 1999-01-01)

Coincidence points for single and set valued maps are discussed in this paper. We show if F is essential and F congruent to G then G has a coincidence point.