优雅
发表于 2025-3-28 15:17:04
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intoxicate
发表于 2025-3-28 20:41:44
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disparage
发表于 2025-3-29 02:22:13
The Dimension One Case, the existence of certificates depends on choosing the right set of generators; in contrast to Schmüdgen’s Positivstellensatz, results here are not true for any possible set of generators. Finally, we take a brief look at positivity on curves in the plane.
Brain-Waves
发表于 2025-3-29 04:07:54
Sums of Squares of Rational Polynomials,will never produce an exact answer. With this in mind, a natural question to ask is the following: Suppose . such that . is sos in ., then can . be written as a sum of squares in .? As we shall see, in the general case, the answer is “no”. More generally, we can ask these questions replacing . by any subfield of ..
colloquial
发表于 2025-3-29 09:36:20
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defeatist
发表于 2025-3-29 11:48:49
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Toxoid-Vaccines
发表于 2025-3-29 17:18:36
Sums of Squares and Positive Polynomials, polynomials and sums of squares, which underlies everything else in the book. This theory has its origins in the work of Hilbert from the late 19th century; Hilbert’s interest in these topics appears to have started when he was an officially appointed “opponent” for Minkowski’s thesis defense on Ju
微尘
发表于 2025-3-29 20:06:46
Positivity on Semialgebraic Sets,interested in certificates of positivity for . or . on subsets .. For the most part, we focus on basic closed semialgebraic sets ., i.e., subsets of . defined by finitely many non-strict polynomial inequalities.
河潭
发表于 2025-3-30 00:51:43
The Archimedean Property,n language, it says that every real number is bounded above by a natural number: For . there is . so that .. It follows that there are no infinitesimally large or small elements in .; every element is bounded. This idea of bounded elements extends to real commutative rings in a natural way, and it t
interference
发表于 2025-3-30 05:14:50
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