News for hackers. Stuff that matters.
Re:Light computes any desired linear transform without a dig... by Buttons840 on Monday September 27, 2021 @12:11PM (#28672525)
> Would it be possible to develop a computer from linear transformations?

No, a program consisting of a billion linear transformations could be simplified to a single linear transformation. The halting problem would be solved, all programs can halt. All calculations, no matter how many linear transformations they consist of, could be simplified to a single linear transformation. This would be absurdly good, but still absurd, thus impossible.

Re:Light computes any desired linear transform without a dig... by Buttons840 on Monday September 27, 2021 @04:11PM (#28675430)
A key insight is that any combinations of linear transformations is a linear transformation. Got a sequence of a billion linear transformation? The entire sequence can be expressed as a single linear transformation. Thus, no matter how many linear transformation you perform, you're never able to exceed the abilities of a single linear transformation.