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Publication:4003413
zbMath0785.11022MaRDI QIDQ4003413
Publication date: 18 September 1992
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
identitiessums of squaresquadratic formsPythagoras numberHilbert's 17th problemfield extensionlevelpositive semidefinite forms
Sums of squares and representations by other particular quadratic forms (11E25) Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) (12D15) Introductory exposition (textbooks, tutorial papers, etc.) pertaining to number theory (11-01) Introductory exposition (textbooks, tutorial papers, etc.) pertaining to field theory (12-01)
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