Nhóm Phản Chiếu và Độ Cứng của Đại Số Poisson Bậc Hai

Algebras and Representation Theory - Tập 26 - Trang 329-358 - 2021
Jason Gaddis1, Padmini Veerapen2, Xingting Wang3
1Department of Mathematics, Miami University, Oxford, USA
2Department of Mathematics, Tennessee Technological University, Cookeville, USA
3Department of Mathematics, Howard University, Washington, USA

Tóm tắt

Trong bài báo này, chúng tôi nghiên cứu lý thuyết bất biến của các đại số Poisson bậc hai. Giả sử G là một nhóm hữu hạn của các tự đẳng cấu Poisson bậc thể hiện của một đại số Poisson bậc hai A. Khi dấu Poisson của A là đối xứng, chúng tôi chứng minh một phiên bản Poisson của định lý Shephard-Todd-Chevalley, khẳng định rằng vành Poisson bất biến AG là đối xứng nếu và chỉ nếu G được sinh ra bởi các phép phản chiếu. Đối với nhiều họ lớn khác của các đại số Poisson bậc hai, chúng tôi cho thấy rằng G chứa một số lượng hạn chế hoặc thậm chí không có phép phản chiếu nào. Kết quả về độ cứng Poisson như vậy đảm bảo rằng vành Poisson bất invariant AG tương ứng không đồng cấu với A dưới dạng các đại số Poisson trừ khi G là tầm thường.

Từ khóa

#Lý thuyết bất biến #đại số Poisson bậc hai #nhóm phản chiếu #độ cứng Poisson.

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