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Subresultants

Usage

Subresultants[ ,  , var] 生成变量var的多项式   的主要子结式系数构成的列表.


Notes

• 当两个首项系数都为1的多项式   具有  个公共根时,这两个多项式的前  个子结式为0.
Subresultants 返回一个长度为Min[Exponent[ , var], Exponent[ , var]] + 1 的列表.
• 参见Mathematica 全书: 3.3.4节.
• 同时参见: Resultant, PolynomialGCD, Eliminate, Minors.
Further Examples

Here are two polynomials with leading coefficient one.

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The polynomials have two common roots since this list starts with two zeros.

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This variation shows that multiplicities are counted.

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Here are two more polynomials and their principal subresultant coefficients.

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When b = e, the polynomials have a common root.

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