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#### Positive solutions to singular initial value problems with sign changing nonlinearities

(Elsevier BV, 1998-08-01)

#### Nonlinear superlinear singular and nonsingular second order boundary value problems

(Elsevier BV, 1998-02-01)

#### Multiple solutions for the dirichlet second-order boundary value problem of nonsingular type

(Elsevier BV, 1999-04-01)

#### Multiple solutions for higher-order difference equations

(Elsevier BV, 1999-05-01)

#### Singular differential equations with linear and nonlinear boundary conditions

(Elsevier BV, 1998-02-01)

Existence results are established for the singular equation y " + f(t, y) = 0, where f is not a Caratheodory function. Our nonlinearity f is allowed to change sign.

#### Resonant singular boundary value problems

(Rocky Mountain Mathematics Consortium, 1995-12-01)

Existence theory is developed for the ''resonant'' singular problem (1/(pq))(py')' + lambda(0)y = f(t,y,py') almost everywhere on [0, 1] with lim(t-->0+) p(t)y'(t) = ay(1) + blim(t-->1-) p(t)y'(t) = 0. Here lambda(0) ...

#### Existence theory for nonresonant singular boundary value problems

(Cambridge University Press (CUP), 1995-10-01)

We present some existence results for the ''nonresonant'' singular boundary value problem 1/pq(py')'+ mu y = f(t, y) a.e. on [0,1] with lim(t-->0) + p(t)y'(t)=y(1)=0. Here mu is such that 1/pq(pu')'+mu u=0 a.e. on [0,1] ...