Positive (solid lines) and negative (dashed lines) angular momentum evolution after the formation of the first Larson core for several variations of the reference case. Red curves: reference case (generalized moncen slope limiter and periodic boundary conditions), green curves: outflow boundary conditions, blue curves: minmod slope limiter, purple curves: simulation box twice as large. The value of the angular momentum has been divided by two for the latter to improve the readability of the graph.