The way the problem is decomposed doesn't feel right. In particular, there are too many interfaces, and `Additive`, `Divisible`, `Negative` are unnecessarily disconnected.

I recommend to follow a more (mathematically) natural path. The Gram-Schmidt process works in any inner product space (which is by definition a vector space equipped with an inner product), so consider an

        abstract class InnerProductSpace <V, F> {
            AbelianGroup<V> vectors;
            Field<F> scalars;
            V scale(V vector, F scalar);
            F innerProduct(V v1, V v2);
            V[] orthogonalize(V[] basis) {
                // your Gram-Schmidt implementation here
            }
        }

As a side note, I wouldn't call an orthogonalization method `GramShmidt`. As a client of this library I am not concerned with which process is used. The only thing I care about is that there is the method taking a basis and returning an orthogonalized one.

I also took a liberty to make a shortcut and not spell out the VectorSpace interface, to which a `scale` method really belongs.

The `Field` is what holds addition and multiplication together:

        public interface Field<F> {
            F add(F f1, F f2);
            F mul(F f1, F f2);
            F neg(F f);
            F inv(F f);
       }

It is OK to have `sub` and `div` instead of `neg` and `inv`.

Notice that the field _must_ be closed under its operation. An addition (or multiplication) returning a type different than the type of arguments makes no mathematical sense.

I have to admit that I have no idea how to express other constraints a.k.a. field axioms. I doubt that it is possible.