Sergei A. Abramov and Moulay A. Barkatou, On Strongly Non-Singular Polynomial Matrices.- Moulay Barkatou, Thomas Cluzeau and Carole El Bacha, On the Computation of Simple Forms and Regular Solutions of Linear Difference Systems.- Johannes Blumlein, Mark Round and Carsten Schneider, Re?ned Holonomic Summation Algorithms in Particle Physics.- Shaoshi Chen, Bivariate Extensions of Abramov's Algorithm for Rational Summation.- Hao Du, Hui Huang and Ziming Li, A q-Analogue of the Modi?ed Abramov-Petkovsek Reduction.- Manuel Kauers and Doron Zeilberger, Factorization of C-?nite Sequences.- Johannes Middeke and Carsten Schneider, Denominator Bounds for Systems of Recurrence Equations using ?S-Extensions.- Evans Doe Ocansey and Carsten Schneider, Representing (q-)Hypergeometric Products and Mixed Versions in Difference Rings.- Anton A. Panferov, Linearly Satellite Unknowns in Linear Differential Systems.- Peter Paule and Silviu Radu, Rogers-Ramanujan Functions, Modular Functions, and Computer Algebra.