Object numeric has to be available globally

[JuStTheDev]

I am using numeric in a Typescript-Surrounding. If my ts-File looks like this:

import * as numeric from numeric;
...
class abc {
    ...
    function xyz() {
        const hessian = [[1,2], [3,4]]; //some matrix here
        const eigenValues = numeric.eig(hessian);
    }
}

this will fail during runtime. If I add window.numeric = numeric and then call window.numeric.eig it will work fine but through errors due to invalid TS.
To find the source of Error I have to step into the toUpperHessenberg-Function

and there on line 1368, a virtual js-File is created (I suspect the clone oder identity-Call) which looks like this:

and in that scope, numeric is undefined, if it's as I mentioned, not in the window-Scope for example.

I can't really figure out what happens here exactly with this virtual file and would be glad for any advice it I got it completely wrong this time. Else, this is a bug.