Many of you will be familiar with the Moore-Penrose pseudoinverse [0], a generalization of the matrix inverse which is defined for non-square matrices and zero

Many of you will be familiar with the Moore-Penrose pseudoinverse [0], a generalization of the matrix inverse which is defined for non-square matrices and zero matrices, frequently applied in machine learning and statistics. However, like Hawking, with whom he was a collaborator (as you read in the article), he also wrote several highly successful popular books. I haven't yet read the Emperor's New Mind and look forward to doing so, but I have read the excellent The Road To Reality: A Complete Guide to the Laws of the Universe [1]. I might also recommend some joint lectures between the two of them [2]. I don't think there could be a more fitting author for Stephen Hawking's obituary. [0]: https://en.wikipedia.org/wiki/Moore%E2%80%93Penrose_inverse https://en.wikipedia.org/wiki/Moore%E2%80%93Penrose_inverse [1]: https://en.wikipedia.org/wiki/The_Road_to_Reality https://en.wikipedia.org/wiki/The_Road_to_Reality [2]: https://arxiv.org/pdf/hep-th/9409195.pdf https://arxiv.org/pdf/hep-th/9409195.pdf