Complex sentence: The relative error of HLL is 1.04 /\\ sqrt and it needs O (\\ epsilon ^\\ log\\ log n +\\ log n) space, where is the set cardinality and is the number of registers (usually less than one byte size).
Split into simpler sentences: The relative error of HLL is 1.04 /\\ sqrt and it needs O (\\ epsilon ^\\ log\\ log n +\\ log n) space. Being the set cardinality and the number of registers (usually less than one byte size).