Affine invariants, relatively prime sets, and a phi function for subsets of {1,2,⋯,n}.
Nathanson, Melvyn B.
Integers, Tome 7 (2007), / Harvested from The Electronic Library of Mathematics
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Publié le : 2007-01-01
EUDML-ID : urn:eudml:doc:127576 
@article{05115935,
     title = {Affine invariants, relatively prime sets, and a phi function for subsets of },
     journal = {Integers},
     volume = {7},
     year = {2007},
     zbl = {1114.11005},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05115935}
}

Nathanson, Melvyn B. Affine invariants, relatively prime sets, and a phi function for subsets of . Integers, Tome 7 (2007) . http://gdmltest.u-ga.fr/item/05115935/