On posets of width two with positive Tits form

• Видавець: Lugansk National Taras Shevchenko University
• Дата: 2018
• Автори: Bondarenko, Vitalij M., Styopochkina, Marina V.
• Формат: Стаття
• Мова: English
• Опубліковано: Lugansk National Taras Shevchenko University 2018
• Теми: minimax (semiminimax) sum; (min; max)-equivalent posets; positive form; the quadratic Tits form; 15A63; 16G20; 16G60
• Онлайн доступ: https://admjournal.luguniv.edu.ua/index.php/adm/article/view/933

We give a complete description of the finite posets of width two with the Tits form to be positive. This problem arises in studying the categories of representations of posets of finite type.