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The isogeny theorem: $\mathrm{Hom}_K(A,A')$
$ = \mathrm{Hom}_{G_K}(T_\ell(A),T_\ell(A'))$$$\mathrm{Hom}_K(A,A') = \mathrm{Hom}_{G_K}(T_\ell(A),T_\ell(A')).$$
$ = \mathrm{Hom}_{G_K}(T_\ell(A),T_\ell(A'))$
The isogeny theorem: $$\mathrm{Hom}_K(A,A') = \mathrm{Hom}_{G_K}(T_\ell(A),T_\ell(A')).$$
The isogeny theorem: $\mathrm{Hom}_K(A,A') = \mathrm{Hom}_{G_K}(T_\ell(A), T_\ell(A'))$.$\mathrm{Hom}_K(A,A')$
The isogeny theorem: $\mathrm{Hom}_K(A,A') = \mathrm{Hom}_{G_K}(T_\ell(A), T_\ell(A'))$.