Tate's correspondence conjecture for isomorphic two-dimensional Galois representations
Tate's correspondence conjecture for isomorphic two-dimensional Galois representations
Let and be varieties defined over , and let and be isomorphic two-dimensional Galois representations occurring in their étale cohomology. A correspondence between and is an algebraic cycle on ; it is defined over when the cycle is defined over . The Tate conjecture. If and are isomorphic, there should be a correspondence between and defined over that induces an isomorphism between and . This predicts that isomorphisms between Galois-representation pieces of the étale cohomology of varieties have a geometric realization by algebraic cycles defined over the ground field. The source formulates the claim as the Tate conjecture and gives no resolution evidence here.
Sources & referencesView supporting material
Primary source
S. Cynk and C. Meyer, “Modular Calabi-Yau threefolds of level eight”, arXiv:math/0504070 (2005).
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