Revista Brasileira de Ensino de FísicaIntrodução à mecânica dos quanta Parte IVTheodoro A. RamosPublished Jan 1, 2004• 0 citationsPublisherAbstractIn the fourth paper of the series, the author introduces the matrix mechanics due to Heisenberg and shows its equivalence to the Schrödinger's undulatory mechanics.DOI10.1590/s1806-11172004000100013