Subresultants
 Usage
• Subresultants[ ,  , var] 生成变量 var的多项式  和  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  和  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.
 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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