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Metz

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128 reputation
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location Rome, Italy
age 23
visits member for 2 years, 4 months
seen Jun 15 '12 at 23:08
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128 reputation
 bio website visits member for 2 years, 4 months
14 badges
 location Rome, Italy seen Jun 15 '12 at 23:08
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1 Answer

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 Why is the number of possible subsequences $2^n$?

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+20 Why is the number of possible subsequences $2^n$?
+5 $(\{0, 1, … , 2^n-1\}, \oplus)$ groups

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 $(\{0, 1, … , 2^n-1\}, \oplus)$ groups

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algorithms
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permutations
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group-theory

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