Evaluating derivatives: principles and techniques of algorithmic differentiation
Evaluating derivatives: principles and techniques of algorithmic differentiation
Testing Unconstrained Optimization Software
ACM Transactions on Mathematical Software (TOMS)
Test Examples for Nonlinear Programming Codes
Test Examples for Nonlinear Programming Codes
Solving the Trust-Region Subproblem using the Lanczos Method
SIAM Journal on Optimization
GALAHAD, a library of thread-safe Fortran 90 packages for large-scale nonlinear optimization
ACM Transactions on Mathematical Software (TOMS)
CUTEr and SifDec: A constrained and unconstrained testing environment, revisited
ACM Transactions on Mathematical Software (TOMS)
Convex Optimization
Supporting global numerical optimization of rational functions by generic symbolic convexity tests
CASC'10 Proceedings of the 12th international conference on Computer algebra in scientific computing
SIAM Journal on Optimization
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We examine symbolic tools associated with two modeling systems for mathematical programming, which can be used to automatically detect the presence or absence of convexity and concavity in the objective and constraint functions, as well as convexity of the feasible set in some cases. The coconut solver system [Schichl, H. 2004a. COCONUT: COntinuous CONstraints---Updating the technology] focuses on nonlinear global continuous optimization and possesses its own modeling language and data structures. The Dr. Ampl meta-solver [Fourer, R., D. Orban. 2007. Dr. Ampl---A meta solver for optimization. Technical Report G-2007-10, GERAD, Montréal] aims to analyze nonlinear differentiable optimization models and hooks into the ampl Solver Library [Gay, D. M. 2002. Hooking your solver to AMPL]. Our symbolic convexity analysis may be supplemented, when it returns inconclusive results, with a numerical phase that may detect nonconvexity. We report numerical results using these tools on sets of test problems for both global and local optimization.