Electron spin

Keynote speech at the International Conference on “Metal, Mining and Magnetic Materials”, November 01-02, 2018, Paris, France. A pdf file of this video: https://shpenkov.com/pdf/TroubleElSpin.pdf Website of the author: https://shpenkov.com See also the pdf file for the new version of this presentation. It differs from the previous one by the new title ("On the Foundation of Quantum Electrodynamics"), slightly edited text and presentation of slides, as well as the introduction of additional material related to the analysis of the Dirac equation: https://shpenkov.com/pdf/QEDbasis.pdf