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Results tagged with real-algebraic-geometry
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user 38620
Real algebraic geometry is the study of real solutions to algebraic equations with real coefficients. Its methods are rather different from classical algebraic geometry, which is typically done over an algebraically closed field (like the complex numbers).
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Determine whether a system of polynomials with real coefficients has a real solution?
Today my students asked me the following problem：
Define polynomials $P_j$ with real coefficients
$$P_{j}=\sum_{i_{1},\cdots,i_{s}}a^{(j)}_{i_{1}\cdots i_{s}}X^{i_{1}}_{1}\cdots X^{i_{s}}_{s}, \qqu …
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