Differentiation (calculus) 5 Mathematical models Nonlinear equations 5 Approximation theory 3 Boundary value problems 3 Convergence of numerical methods 3 Discretized Newton method 3 Function evaluation 3 Functional elimination 3 Iterative methods 3 Jacobian matrix 3 Matrix algebra 3 Monotone discrete Newton iterations 3 Monotone sequences 3 Nonlinear systems 3 Order convex functions 3 Theorem proving 3 A priori estimates 2 A-priori estimates 2 Angiogenesis 2 Differential equations 2 Existence of positive periodic solutions 2 LeraySchauder degree methods 2 Nonautonomous 2 Nonlinear nonautonomous delay differential equations 2 Problem solving 2 Second order Liénard type equation 2 Second orders 2