[BubRoss]

When something doesn't need to change, that's at least an established algorithm. Algorithms like sorting, partitioning, hashing, reduce, map, swap etc. are common and don't change. Mathematics like linear algebra don't change. They are fundamental elements of most nontrivial programs.

[jolux]

Sure, that part I agree with. But the stuff around it, i.e. how those fundamentals are used and composed, also qualify as algorithmic to me. It’s probably a lower-level definition than you’re using, because to me all programs are an algorithm of some kind.

[BubRoss]

I don't know what you are trying to say at this point. You were arguing that every part of a program changes and expands. It should be pretty clear that that is not true.