A continuous, constructive solution to Hilbert's 17th problem.
Delzell, C.N.
Inventiones mathematicae, Tome 75 (1984), p. 365-384 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1984-01-01
EUDML-ID : urn:eudml:doc:143128 
@article{GDZPPN002100541,
     title = {A continuous, constructive solution to Hilbert's 17th problem.},
     journal = {Inventiones mathematicae},
     volume = {75},
     year = {1984},
     pages = {365-384},
     zbl = {0547.12017},
     url = {http://dml.mathdoc.fr/item/GDZPPN002100541}
}

Delzell, C.N. A continuous, constructive solution to Hilbert's 17th problem.. Inventiones mathematicae, Tome 75 (1984) pp. 365-384. http://gdmltest.u-ga.fr/item/GDZPPN002100541/