**N. Andrei,**UOP - A collection of 80 unconstrained optimization problems. ICI Technical Report No.7/2018, November 17, 2018**N. Andrei,**A collection of 75 unconstrained optimization test problems. ICI Technical Report No.6/2018, May 10, 2018**N. Andrei,**A set of unconstrained optimization test problems. ICI Technical Report No.4/2018, May 2, 2018**N. Andrei,**A double parameter scaled modified Broyden-Fletcher-Goldfarb-Shanno method for unconstrained optimization. Technical Report No.3/2018, April 4, 2018**N. Andrei,**A diagonal quasi-Newton updating method for unconstrained optimization. Technical Report No.2/2018, March 10, 2018**N. Andrei,**A diagonal quasi-Newton updating method based on minimizing the measure function of Byrd and Nocedal for unconstrained optimization. Technical Report No. 1/2018, January 31, 2018**N. Andrei,**A double parameter scaled BFGS method for unconstrained optimization. Preliminary computational results. ICI Technical Report, September 11, 2017**N. Andrei,**A scaled BFGS method with two parameters for unconstrained optimization. ICI Technical Report, May 5, 2017**N. Andrei,**An adaptive scaled BFGS method for unconstrained optimization. ICI Technical Report, March 18, 2018**N. Andrei,**Particle Swarm Optimization Method for Engineering Nonlinear Constrained Optimization. ICI Technical Report, March 15, 2017**N. Andrei,**A descent Conjugate Gradient Algorithm with quasi-Newton updates. ICI Technical Report,March 2, 2017**N. Andrei,**Accelerated adaptive Perry conjugate gradient algorithms based on the self-scaling memoryless BFGS update ICI Technical Report, January 16, 2017 .**N. Andrei,**A Dai-Liao conjugate gradient algorithm with clustering the eigenvalues. ICI Technical Report, January 4, 2017.**N. Andrei,**Adaptive Perry conjugate gradient algorithms based on the self-scaling memoryless BFGS update. ICI Technical Report, October 5, 2016.**N. Andrei,**Eigenvalues versus singular values study in conjugate gradient algorithms for large-scale unconstrained optimization. ICI Technical Report, August 1, 2017**N. Andrei,**An adaptive conjugate gradient algorithm with clustering the singular values of the search direction matrix for large-scale unconstrained optimization. ICI Technical Report, July 18, 2016**N. Andrei,**Solving Linear Equation Systems. ICI Technical Report, June 18, 2016**N. Andrei,**Optimality conditions for continuous nonlinear optimization. ICI Technical Report, January 12, 2016.**N. Andrei,**Descent Conjugate Gradient Algorithm with quasi-Newton updates. ICI Technical Report. November 6, 2015.**N. Andrei,**A new adaptive conjugate gradient algorithm for large-scale unconstrained optimization. ICI Technical Report, June 18, 2015.**N. Andrei,**An adaptive conjugate gradient algorithm for large-scale unconstrained optimization. ICI Technical Report, May 20, 2015.**N. Andrei,**Test functions for unconstrained optimization. ICI Technical Report, June 20, 2013.**N. Andrei,**A numerical study on efficiency and robustness of some conjugate gradient algorithms for large-scale unconstrained optimization. ICI Technical Report, May 22, 2013.**N. Andrei,**Performance of AHYBRIDM, ASCALCG, CG-DESCENT, DESCON and THREECG for solving 5 applications from MINPACK-2. ICI Technical Report, April 3, 2013.**N. Andrei,**Another numerical example for CG_DESCENT conjugate gradient algorithm. ICI Technical Report, January 4, 2013.**N. Andrei,**A numerical example for CG_DESCENT conjugate gradient algorithm. ICI Technical Report, November 15, 2012.**N. Andrei,**DESCON versus CG-DESCENT for solving 5 applications from MINPACK2. ICI Technical Report, September 13, 2012.**N. Andrei,**Some more comparisons of DESCON with different values for the parameter „maxls” versus CG-DESCENT . ICI Technical Report, September 12, 2012.**N. Andrei,**Comparisons: DESCON versus CG-DESCENT**.**ICI Technical Report, September 10, 2012.**N. Andrei,**CPU time metric comparisons: DESCON, TTS, CG-DESCENT . ICI Technical Report, July 18, 2012.**N. Andrei**, An accelerated subspace minimization three-term conjugate gradient algorithm for unconstrained optimization. ICI Technical Report, July 12, 2012.**N. Andrei,**On three-term conjugate gradient algorithms for unconstrained optimization. ICI Technical Report, March 14, 2012.**N. Andrei,**A simple three-term conjugate gradient algorithm for unconstrained optimization. ICI Technical Report, March 6, 2012.**N. Andrei,**WORKS 2011, Bucharest, December 2011. (Romanian Academy Library, with CD)**N. Andrei,**Metoda MINOS, Raport Tehnic ICI, 8 August, 2011**N. Andrei,**UNO: A package for unconstrained optimization methods using direct searching techniques. ICI Technical Report. April 20, 2011.**N. Andrei,**CAON: O Colectie de Aplicatii de Optimizare Neliniara in limbajul GAMS. ICI Technical Report No.1/2011, Ianuarie 31, 2011.**N. Andrei,**WORKS 2010, Bucharest, December 2010. (Romanian Academy Library, with CD)**N. Andrei,**Another accelerated conjugate gradient algorithm with guaranteed descent and conjugacy conditions for large-scale unconstrained optimization, ICI Technical Report, November 29, 2010**N. Andrei,**Performances of SPG for solving MINPACK-2 applications. ICI Technical Report, September 14, 2010- N. Andrei, Comparison between LBFGS-B and SPG with cubic interpolation in line search. ICI Technical Report, September 1, 2010
**N. Andrei**, Comparison between SPG with quadratic interpolation and SPG with cubic interpolation. ICI Technical Report, August 31, 2010**N. Andrei**, Comparison between LBFGS-B and SPG with quadratic interpolation in line search. ICI Technical Report, August 31, 2010**N. Andrei,**O Colectie de Probleme de Programare Liniara. ICI Technical Report, August 15, 2010**N. Andrei,**Comparison LBFGS-B versus LBFGS. ICI Technical Report, August 10, 2010**N. Andrei**, Computational results for LBFGS-B. ICI Technical Report, August 10, 2010**N. Andrei,**Performances of LBFGS-B for solving MINPACK-2 applications. ICI Technical Report, August 9, 2010-
**N. Andrei,**Another accelerated conjugate gradient algorithm with guaranteed descent and conjugacy conditions for large-scale unconstrained optimization**,**ICI Technical Report, January 29, 2010 **N. Andrei,**New Accelerated Conjugate Gradient Algorithms as modification of Dai-Yuan’s computational scheme for Unconstrained Optimization, ICI Technical Report, January 27, 2010.**N. Andrei,**WORKS 2009, Bucharest, December 2009. (Romanian Academy Library, with CD)**N. Andrei,**Accelerated scaled memoryless BFGS preconditioned conjugate gradient algorithm for unconstrained optimization. ICI Technical Report, July 31, 2009**N. Andrei**, CGALLACC - Accelerated conjugate gradient algorithms for unconstrained optimization. ICI Technical Report No. 17/2009, March 30, 2009. (Romanian Academy Library, with CD)**N. Andrei,**Acceleration of conjugate gradient algorithms for unconstrained optimization. ICI Technical Report No. 16, March 16, 2009**N. Andrei**, Accelated hybrid conjugate gradient algorithm with modified secant condition for unconstrained optimization. ICI Technical Report No. 14, February 23, 2009**N. Andrei,**Colectie de prototipuri de modele de optimizare neliniara. ICI Technical Report. January 12, 2009**N. Andrei,**WORKS 2008, Bucharest, December 2008. (Romanian Academy Library, with CD)**N. Andrei,**An accelerated conjugate gradient algorithm with guaranteed descent and conjugacy conditions for unconstrained optimization. ICI Technical Report No. 36/08, December 10, 2008.**N. Andrei,**HYBRID, HYBRIDM, AHYBRIDM conjugate gradient algorithms for unconstrained optimization. Technical report No. 35, October 20, 2008. (Romanian Academy Library, with CD)**N. Andrei,**Computational experience with LBFGS - a limited memory BFGS quasi-Newton method for unconstrained optimization. Technical Report No. 32, October 3-14, 2008. (Romanian Academy Library, with CD)**N. Andrei,**Numerical experiments with accelerated hybrid conjugate gradient algorithm with modified secant condition - AHYBRID- for unconstrained optimization. ICI Technical Report No. 30/08, September 24, 2008**N. Andrei,**Numerical experiments with accelerated conjugate gradient algorithm with Hessian / vector product -ACGHES- for unconstrained optimization. ICI Technical Report No. 29/08, September 22, 2008**N. Andrei,**Open Problems in Nonlinear Conjugate Gradient Algorithms for Unconstrained Optimization. ICI Technical Report No. 28/08, July 30, 2008**N. Andrei,**New accelerated conjugate gradient algorithms for unconstrained optimization. ICI Technical Report No. 24/08, June 18, 2008**N. Andrei,**Accelerated scaled memoryless BFGS preconditioned conjugate gradient algorithm for unconstrained optimization.

ICI Technical Report No. 16/08, March 24, 2008**N. Andrei,**40 conjugate gradient algorithms for unconstrained optimization. A survey on their definition.

ICI Technical Report No. 13/08, March 14, 2008**N. Andrei,**Performance profiles of line-search algorithms for unconstrained optimization.

ICI Technical Report No. 12/08, March 5, 2008**N. Andrei,**A hybrid conjugate gradient algorithm with modified secant condition for unconstrained optimization.

ICI Technical Report No. 3/08, February 6, 2008**N. Andrei,**SCALCG - Scaled Conjugate Gradient Algorithms for Unconstrained Optimization. Technical Report No. 17/2007, March 30, 2007 . (Romanian Academy Library, with CD)**N. Andrei,**SAMO - Tehnologie Informatica Avansata pentru Modelare si Optimizare. Raport Tehnic No. 18/2007, Martie 8, 2007. (Romanian Academy Library, with CD)**N. Andrei,**Another conjugate gradient algorithm for unconstrained optimization.

ICI Technical Report No.28/07, August 12, 2007**N. Andrei**, New hybrid conjugate gradient algorithms for unconstrained optimization.

ICI Technical Report No. 26/07, September 26, 2007**N. Andrei,**Numerical comparison of conjugate gradient algorithms for unconstrained optrimization.

ICI Technical Report No. 29/07, October 10, 2007**N. Andrei,**CGALL - Conjugate Gradient Algorithms for Unconstrained Optimization. Technical Report No. 16/2007, March 5, 2007. (Romanian Academy Library, with CD)**N. Andrei,**WORKS 2007, Bucharest, December 2007. (Romanian Academy Library)**N. Andrei,**WORKS 2006, Bucharest, December 2006. (Romanian Academy Library)**N. Andrei,**WORKS 2005, Bucharest, December 2005. (Romanian Academy Library)**N. Andrei**, WORKS 2004, Bucharest, December 2004. (Romanian Academy Library)**N. Andrei**, Computational experience with SPENBAR - A Sparse Modified Penalty-Barrier Method for Large-Scale Nonlinear, Equality and Inequality, constrained optimization Technical Report No. 4/2001, February 19, 2001. (Romanian Academy Library with CD)

**N., Andrei,**

*Numerical Examples with SPENBAR - Modified penalty barrier method for*

large-scale nonlinear programming problems. Part I.

ICI Technical Report, ICI-TR-01/2001, Bucharest, February 2001.

**N., Andrei,**

*An Interior Point Algorithm for Nonlinear Programming.*

ICI Technical Report, August 3, 1998.**N., Andrei,**

*Alternative Model Formulations in Nonlinear Programming.*

ICI Technical Report, January 22, 1998.**N., Andrei,**

*Predictor-Corrector Interior-Point Methods for Linear Constrained Optimization.*

ICI Technical Report, September 23, 1997.**N., Andrei,**

*MINOS Examples considered into the book: Advanced Mathematical Programming.*

Theory, Computational Methods, Applications.

ICI Technical Report, March 25, 1997.**N., Andrei,**

*NLPQL Examples considered into the book: Advanced Mathematical Programming.*

Theory, Computational Methods, Applications.

ICI Technical Report, March 25, 1997.**N., Andrei,**

*SPENBAR Examples considered into the book: Advanced Mathematical Programming.*

Theory, Computational Methods, Applications.

ICI Technical Report, March 25, 1997.**N., Andrei,**

*Alternative model formulations in nonlinear programming.*

Some disastrous computational results with four codes: GRG2, CONOPT, MINOS/AUGMENTED and SPENBAR.

ICI Technical Paper, May 26, 1996.**N., Andrei,**

*Numerical Examples with SPENBAR for Large-Scale Nonlinear, Equality and Inequality Constrained Optimization with Zero Columns in Jacobian Matrices.*

ICI Technical Paper No. AMOL-96-5, March 29, 1996.**N., Andrei,**

*Computational Experience with SPENBAR a Sparse Variant of a Modified Penalty-Barrier Method for Large-Scale Nonlinear, Equality and Inequality Constrained Optimization.*

ICI Technical Paper No. AMOL-96-4, March 11, 1996, pp.1-69.**N., Andrei,**

*Computational Experience with a Modified Penalty-Barrier Method for Large-Scale Nonlinear Constrained Optimization. (FORTRAN subroutines)*

ICI Working Paper No. AMOL-96-1, February 6, 1996.**N., Andrei,**

*SIMEQ - Package for solving linear algebraic systems AX=b by Gauss method of elimination with column pivoting to determine x (solution of the system) and AINV (the inverse of the matrix).*ICI Working Paper No. 5, January 25, 1995

(Romanian Academy Library, with CD)**N., Andrei, Ghe., Borcan**

*ALLO - Algebraic Language for Linear Optimization.*

ICI Technical Report, LSSO 2-95, Bucharest, September 21, 1995, pp.1-44.**N. Andrei**

RF - Package for solving large-scale linear algebraic systems with Product Form of Inverse (PFI) and Bump and Spike Pressigned Pivot Procedure.

Technical Report No. 4, September 3, 1995.

(Romanian Academy Library)

**N., Andrei,**

*Computational Experience with Conjugate Gradient Algorithms for Large-Scale Unconstrained Optimization.*

ICI Technical Report, Bucharest, July 21, 1995, pp.1-26.**N., Andrei,**

*STRUCTURE - An interactive package for structural evaluation of the determinant and characteristic polynomial of a matrix in symbolic form using its digraph representation.*

Forschungsberiicht Nr. 4/1991, Mess-, Steuer- und Regelungstechnik,

Universitaet -GH- Duisburg, pp.1-61.**N., Andrei,**

*CYCLE - An interactive package for cycle determination in digraphs.*

Forschungsbericht Nr. 10/1990, Mess-, Steuer- und Regelungstechnik,

Universitaet -GH- Duisburg, pp.1-31.**N., Andrei,**

*XLP - Linear Programming Library. Documentation manual.*

ICI Technical Report, LSSO-30A-86, Bucharest, 1986.

**N., Andrei,**

*XLP - Linear Programming Library. FORTRAN programs.*

ICI Technical Report, LSSO-30B-86, Bucharest, 1986.

**N., Andrei,**

*XLP - Linear Programming Library. Numerical examples.*

ICI Technical Report, LSSO-30C-86, Bucharest, 1986.

**N., Andrei,**

*Application of sparse matrix techniques in GRG algorithm for large-scale*

nonlinear programming.

ICI Technical Report, LSSO-026, Bucharest, June 1984, pp. 1-19.

**N., Andrei,**

*Metode de siteza a regulatoarelor liniare utilizand tehnici de calcul*

cu matrice rare pentru sisteme de mari dimensiuni.

ICI Technical Report, LSSO-022, Bucharest, March 1984, pp. 1-142.

(Paper placed in Library of Romanian Academy)

**N., Andrei,**

*Metode de optimizare a sistemelor automate de mari dimensiuni.*

ICI Technical Report, LSSO-021, Bucharest, Noiembrie 1983, pp. 1-95.

(Romanian Academy Library)

**N., Andrei,**

*Tehnici de calcul cu matrice rare in teoria sistemelor.*

ICI Technical Report, LSSO-020, Bucharest, October 1983, pp. 1-95.

**N., Andrei, C. Rasturnoiu**

*FORTRAN subroutines for solving sparse band, symmetric and positive definite*

linear equation systems of very large-scale dimensions.

ICI Technical Report, LSSO-014, Bucharest, April 1983, pp. 1-8.

**N., Andrei,**

*Digraph exact disturbance rejection of sparse systems.*

ICI Technical Report, RD-LSSO-011, Bucharest, March 1983, pp. 1-15.

**N., Andrei**

*RP - A package for efficient calculation of sparse Jacobian matrix for nonlinear systems of equations using finite differences.*

ICI Technical Report, Bucharest, April 15, 1983, pp. 1-31.

**N., Andrei, C. Rasturnoiu**

*Basic FORTRAN subroutine for large-scale sparse linear programming problems.*

ICI Technical Report, LSSO-016, Bucharest, April 1983, pp. 1-17.

**N., Andrei,**

*MINOPT - Optimization computing library.*

ICI Technical Report, LSSO-009, Bucharest, November 1982, pp. 1-125.

**N., Andrei, C. Rasturnoiu**

*Sparse Matrix Computing library. User's manual.*

ICI Technical Report, LSSO-008, Bucharest, May 1982.

**N., Andrei,**

*An algorithm for parameter estimation in nonlinear systems.*

ICI Technical Report, RD-OG1-006, Bucharest, November 1981, pp. 1-40.

**N., Andrei,**

*Computer aided management of production processes by dynamic modeling.*

ICI Technical Report, RD-OG1-005, Bucharest, October 1981, pp. 1-36.

**N., Andrei,**

*Management of Production Processes by Dynamic Modeling.*

ICI Technical Report, RD-OG1-003, Bucharest, April 1981, pp. 1-234.

(Paper placed in Library of Romanian Academy)

**N., Andrei,**

*Nested decomposition scheme for optimal control of large-scale linear dynamic systems.*

ICI Technical Report, RD-OG1-001, Bucharest, January 1981, pp. 1-23.

**N., Andrei, C. Rasturnoiu**

*O subrutina de calcul a minimului unei functii neliniare de o variablia, pe un interval dat.*

ICI Technical Report, Research Department, Bucharest, Februarie 1980, pp. 1-15.