نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسنده English
Let X be a quasi-compact and semi-separated scheme and QcoX be the category of all quasi-coherent sheaves of O_X -modules. We show that any flat complex of cotorsion quasi-coherent sheaves of O_X -modules is contractible. As an application, it is shown that the homotopy category of cotorsion flat quasi-coherent sheaves of O_X -modules is the natural replacement of the homotopy category of projectives.
کلیدواژهها English