Who invented the tensor?

The concept of tensors was not explicitly discussed in terms of its inventor in the provided clips from the Lex Fridman Podcast. However, historically, the mathematical framework of tensors was developed by the mathematician Tullio Levi-Civita and Gregorio Ricci-Curbastro, which later became essential in Albert Einstein's general theory of relativity. Lex Fridman's podcast does not appear to have covered this specific historical detail directly. For learning about tensors and their development, examining historical mathematical texts or resources specifically focusing on the history of mathematics might be necessary.