| Special issue on  Matrix Theory and Optimization dedicated to Professor Adi Ben-Israel on the occasion of his 85th birthday 
 Preface: Aharon Ben-Tal, Abraham Berman, Yair Censor, Simeon Reich and Alexander
J. Zaslavski
 
 
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																	| Jonathan Barzilai A spectrum algorithm and optimization notes
 
 
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																	| B. Bjorkman, L. Hogben, S. Ponce, C. Reinhart and T. Tranel Applications of analysis to the determination of the minimum number of distinct eigenvalues of a graph
 
 
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																	| Yair Censor and Maroun Zaknoonr Algorithms and convergence results of projection methods for inconsistent feasibility problems: a review
 
 
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																	| Andreas Fischer and Markus Herrich Newton-type methods for Fritz John systems of generalized Nash equilibrium problems
 
 
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																	| Johannes Jahn A derivative-free rooted tree method in nonconvex set optimization
 
 
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																	| Thomas J. Laffey and Helena Smigoc Diagonal realizability in the nonnegative inverse eigenvalue problem
 
 
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																	| Thomas J. Laffey and Helena Smigoc Integer completely positive matrices of order two
 
 
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                        | Aaron Melman Optimization of a Cauchy radius improvement
 
 
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                        | Shoham Sabach, Marc Teboulle and Sergey Voldman A smoothing alternating minimization-based algorithm for clustering with sum-min of duclidean norms
 
 
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                        | Naomi Shaked-Monderer and Abraham Berman Complete positivity over the rationals
 
 
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                        | Bit-Shun Tam On local Perron-Frobenius theory
 
 
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                        | Sanjo Zlobec Geometry of local optima
 
 
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