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Applying the same procedure to any positive integer <math>n\!</math> produces an expression called the ''doubly recursive factorization'' of <math>n.\!</math>  For ease of discussion, it serves to call this the ''drift'' of <math>n\!</math> and to notate the corresponding mapping from numbers to expressions as <math>\operatorname{drift}(n).\!</math>

Applying the same procedure to any positive integer <math>n\!</math> produces an expression called the ''doubly recursive factorization'' of <math>n.\!</math>  It serves to call this the ''drift'' of <math>n\!</math> and to notate the corresponding mapping from positive integers to factorization expressions as <math>\operatorname{drift}(n).\!</math>

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