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[1]を読む上で必要になる, 
cohomological Hall algebra (CoHa) とその周辺の基礎知識を解説をします.
次の3項目を説明する予定です.
1. CoHaの定義と例. [2]の部分的解説です.
2. stable modelから構成されるCoHaの加群. [3]の部分的解説です.
3. [1]の主張の解説.


[1]
M. Rapcak, Y. Soibelman, Y. Yang, G.  Zhao,
Cohomological Hall algebras, vertex algebras and instantons,
arXiv:1810.10402.

[2]
M. Kontsevich, Y. Soibelman, 
Cohomological Hall algebra, exponential Hodge structures 
and motivic Donaldson-Thomas invariants, 
Commun. Number Theory Phys. 5 (2011), no. 2, 231-352;
arXiv:1006.2706.

[3]
Y. Soibelman, 
Remarks on Cohomological Hall algebras and their representations, 
Arbeitstagung Bonn 2013, 355-385, Progr. Math. 319, Birkhuser/Springer, 2016;
arXiv:1404.1606.
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