/sci/ - Science & Math

>>15206676
>>a = sqrt(x^2 + y^2)
Most languages offer a hypot function for that, i.e. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/hypot
>>15205850
Usually when [math]b < a[/math] we interpret [math]\displaystyle \sum_{n = a}^b c_n = \sum_{n = b}^a - c_n[/math] (by analogy with integrals).
So the issue could be [math]n < n_0[/math].