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How is this notation read $$a_{0}^{2^{i}}??$$

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Valent
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devdev_dev
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    $a^{2^i}_0 \text{ modulo } p$ can be read as "*A* zero to the power of two to the *i* modulo *$p$*" – Henry Jan 31 '21 at 22:40

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The number $a_0$ is the input to the function that does the exponentiation. The notation $$a_0^{2^i}$$ then refers to the number $a_0$ to the power of $2^i$.

Mankind
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