2 ms·

It's not really obscure. This is undergrad linear algebra material

• deleted 3y ago
  [deleted]
• RagnarD 3y ago
  There's virtually an infinitude of mathematics at all levels. One could post about any of it randomly, but perhaps it makes sense to have some focus and relevancy to at least - 1%? - of the HN audience. A post on a radically faster new method of factoring large numbers might appear "just mathematical" but it would have extreme relevance to public key cryptography, for example, with enormous consequences overall. That's probably obvious to many - much more obvious than the import of the article commented on here, which is exactly why I wondered and whether it's something of larger importance that I was missing.