Old and New Proofs of Cramer ’ s Rule

  title={Old and New Proofs of Cramer ’ s Rule},
  author={M. Brunetti},
In spite of its high computational cost, Cramer’s Rule for solving systems of linear equations is of historical and theoretical importance. In this paper we list six different proofs of it, the last of which has not apparently been published elsewhere. A discussion on their educational value and the tools involved is also included. Mathematics Subject Classification: 15A06, 97H60, 15A15 

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