Gordon reports an issue at
David opens a ticket at
Vincent fixes the issue. David reviews the fix. The fix is merged in Sage 8.4.beta4.
Since CoCalc has the latest development release of SageMath, let's test this!
We open a Jupyter notebook in CoCalc and select the "SageMath (development)" kernel for Jupyter from the Kernel menu.
g = graphs.CompleteBipartiteGraph(1, 3)