I have 3 subsequent SageMath code cells C1, C2, C3 in a Jupyter notebook.
- C1 sets a value a=1
- C2 has an interact widget (say a slider for a1) using the value of a as default
- C3 should assign the current value of a1 to a and proceed.
What do I have to write in C3 to access the current value of a1 in C2?
