# Rendiconti dell’Istituto di Matematica dell’Università di Trieste: an International Journal of Mathematics vol.54 (2022)

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**Contents**

Sezione 1. Contributi

Kalliongis John, Ohashi Ryo

Orientation reversing finite abelian actions on RP³

Inglese Gabriele, Olmi Roberto

Dehimi Souheyb, Mortad Mohammed Hichem, Bachir Ahmed

Unbounded generalizations of the Fuglede-Putnam theorem

Lipparini Paolo

Products of sequentially compact spaces with no separability assumption

Hussein Sarbast, Benyoucef Salah

Analysis of existence and non-existence of limit cycles for a family of Kolmogorov systems

Alzer Horst, Kwong Man Kam

Monotonicity theorems and inequalities for certain sine sums

Sezione 2. TAGSS 2021 – Trieste Algebraic Geometry Summer School

Grosselli Gian Paolo, Spelta Irene

Explicit analysis of positive dimensional fibres of Pg,r and Xiao conjecture

Borówka Paweł, Ortega Angela

Izadi Elham, Canning Samir, Dutta Yajnaseni, Stapleton David

Sezione 3. Proceedings of the Go 60 Conference – Pure and Applied Algebraic Geomery celebrating Giorgio Ottaviani’s 60th birthday.

Ciliberto Ciro, Miranda Rick

Examples of non-effective rays at the boundary of the Mori cone of blow-ups of the plane

Portakal Irem, Sturmfels Bernd

Geometry of dependency equilibria

Abo Hirotachi, Lazarsfeld Robert, Smith Gregory G.

Ramification and discriminants of vector bundles and a quick proof of Bogomolov’s theorem

Lazić Vladimir, Schreyer Frank-olaf

Birational geometry and the canonical ring of a family of determinantal 3-folds

Chiantini Luca

On the study of decompositions of forms in four variables

Landsberg J.m.

Secant varieties and the complexity of matrix multiplication

Ng Kwing King Wayne, Vallès Jean

New examples of free projective curves

Boralevi Ada, Mezzetti Emilia

Pencils of singular quadrics of constant rank and their orbits

Biaggi Benjamin, Draisma Jan, Seynnaeve Tim

On the quadratic equations for odeco tensors

Fania Maria Lucia, Lanteri Antonio