3 ms·The equations haven't rendered, might be some proofreading needed.by politelemon 2y agoThe equations haven't rendered, might be some proofreading needed.blitzar 2y agoPerhaps the author hallucinated?ldng 2y agoOriginal article : https://www.jianshu.com/p/038236a34316 https://www.jianshu.com/p/038236a34316 (edit: or not; not sure which one is the source)