摘要: EXAMPLES. (i) The multiplicative group A = Gm is the algebraic whose points over a field are nonzero elements of field. Then for any K, Tor Gm(K) roots unity contained in K. (ii) × then Tor(A) Tor(Gm) {(x, y) : x, y ∈ K unity}. (iii) Let be an elliptic curve. Over complex numbers we can uniformize as C/L where L lattice. Tor(A(C)) Q ⊗ L/L.
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