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4 questions
6
votes
1
answer
362
views
What does an endomorphism in a triangulated category give rise to?
Let $D\xrightarrow[]\varphi D\xrightarrow[]kE\xrightarrow[]j\Sigma D$ be an exact triangle in a triangulated category. I am trying to figure out what structure emerges from this on the base of the ...
5
votes
1
answer
187
views
Is this a description of the $\aleph_1$-localizing subcategory generated by a compact generator?
This should be obvious but I'm not seeing it:
The $\mathfrak T$ be a triangulated category with coproducts and with a compact generator $A$ (that is, the functor $\mathfrak T(A,\_)$ preserves ...
4
votes
0
answers
513
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Good morphisms of distinguished triangles: can Neeman's method be applied to the motivic stable homotopy category?
It is well known that non-uniqueness of a cone for a morphism in a triangulated category $C$ makes constructing exact functors (of triangulated categories) a difficult task. In section 3 of his "Some ...
14
votes
3
answers
1k
views
Classifying triangulated structures on a graded category
I know of several results to the effect that two triangulated categories are equivalent categories (usually one coming from algebra and one coming from topology). However, it's never been clear to me ...