There are not Exactly Five Objects
Blass, Andreas
J. Symbolic Logic, Tome 49 (1984) no. 1, p. 467-469 / Harvested from Project Euclid
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We exhibit a Horn sentence expressing the statement of the title; the construction generalizes to arbitrary primes in place of five.
Publié le : 1984-06-14
Classification:  
@article{1183741545,
     author = {Blass, Andreas},
     title = {There are not Exactly Five Objects},
     journal = {J. Symbolic Logic},
     volume = {49},
     number = {1},
     year = {1984},
     pages = { 467-469},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183741545}
}

Blass, Andreas. There are not Exactly Five Objects. J. Symbolic Logic, Tome 49 (1984) no. 1, pp.  467-469. http://gdmltest.u-ga.fr/item/1183741545/