If you really want to practice programming professionally, HTML, CSS, etc. and even Javascript are not enough. Java, Perl, C etc. are sufficient.
Well, that's another topic. So let's get back to the topic of this thread.
I said that in our culture numbers have become functions. There has never been such a development in relation to numbers before.
And you brought up "Algebra". It comes originally from another culture, but has been further developed in our culture and incorporated into the overall structure of functions. With us the term has been extended to links of a general kind, so-called "algebraic structures", and so there is a lattice algebra, a switching algebra and other algebras - yes, one has to speak of algebras (plural!) by now -, and also inequalities actually belong to algebra. Ordinary algebra does not want to teach the pure calculation of numbers (see: arithmetic), but rather general rules of connection (therefore it often uses so-called "general numbers", which are expressed by letters); it deals with numbers up to the complex numbers, and this is what I wanted to express with the first picture: the Gaussian number plane.
- N_F.png (52.38 KiB) Viewed 151 times
The illustrated examples in the coordinate axes are really only meant as an illustration for the fact that the occidental mathematics has become the mathematics of the world, which means just among other things that numbers are regarded only as functions.