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Description
Simple Algebras, Base Change, and the Advanced Theory of the Trace FormulaA general principle, discovered by Robert Langlands and named by him the "functoriality principle," predicts relations between automorphic forms on arithmetic subgroups of different reductive groups. Langlands functoriality relates the eigenvalues of Hecke operators acting on the automorphic forms on two groups (or the local factors of the "automorphic representations" generated by them). In the few instances where such relations have been probed,
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.4 ★★★★★
Based on 625 reviews
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Product Reviews
★★★★★ 5
very warm
Color: (010) Jet Gray / Black / White, Size: One Size
My husband loves his. Super warm, sometimes to warm. Very comfortable, can wear it all day. Not itchy material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
★★★★★ 5
Under armor can’t go wrong
Color: (002) Gravel / Downpour Gray / White, Size: One Size
Warm fits good, love it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2025
★★★★★ 5
Delivered on Time!
Color: (002) Gravel / Downpour Gray / White, Size: One Size
Was delivered exactly when it said it would come and arrived without any issues. I like the hat and I'm certain my husband will too
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Reviewed in the United States on January 20, 2025
★★★★★ 3
Warm but....
Color: (002) Gravel / Downpour Gray / White, Size: One Size
Warm and good quality as usual with UA products but it fits tight. If you have a large head, I'd stay away from it.
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Reviewed in the United States on February 19, 2025
★★★★★ 5
Waem and soft
Color: (002) Gravel / Downpour Gray / White, Size: One Size
What I want best warm soft and fits well
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Reviewed in the United States on December 26, 2023
