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Solution formulas for cubic equations without or with constraints

  • Ting Zhao*
  • , Dongming Wang
  • , Hoon Hong
  • *Corresponding author for this work
  • LMIB & School of Mathematics and System Science
  • Beihang University
  • Laboratoire d'Informatique de Paris 6
  • Department of Mathematics
  • North Carolina State University

Research output: Contribution to journal › Article › peer-review

Abstract

We present a convention (for square/cubic root) which provides correct interpretations of the Lagrange formula for all cubic polynomial equations with real coefficients. Using this convention, we also present a real solution formula for the general cubic equation with real coefficients under equality and inequality constraints.

Original languageEnglish
Pages (from-to)904-918
Number of pages15
JournalJournal of Symbolic Computation
Volume46
Issue number8
DOIs
StatePublished - Aug 2011
Externally publishedYes

Keywords

  • Constraint
  • Cubic polynomial
  • Root convention
  • Solution formula

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