Second order equations with nonnegative characteristic form constitute a new branch of the theory...

This book explores the discursive dimension of Russia's invasion of Ukraine. It analyzes how pol...

Este livro consiste no conteúdo do Trabalho de Conclusão de Curso apresentado à Coordenação do Ba...

This book explores the discursive dimension of Russia's invasion of Ukraine. It analyzes how pol...

It was mainly during the last two decades that the theory of homogenization or averaging of parti...

1.1. Nearly Integrable Hamiltonian Systems. In this work we examine the system of Hamiltonian equ...

Ukraine drew significant media attention after the 2013-2014 Revolution of Dignity and the subseq...