CLHS: Section 14.1.2.2

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## 14.1.2.2 Lists as Sets

Lists are sometimes viewed as sets by considering their elements unordered and by assuming there is no duplication of elements.

    adjoin         nset-difference    set-difference    union
    intersection   nset-exclusive-or  set-exclusive-or
    nintersection  nunion             subsetp

Figure 14-5. Some defined names related to sets.

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