1 | initial version |
Doubly indexed variables are often useful.
No easy construct exists like for simply indexed ones though.
That said, list comprehension makes it relatively easy.
Here is one way to obtain the requested indexing.
sage: α = [var(f"α_{i}_{j}", latex_name=fr"\alpha_{{{i},{j}}}")
....: for i in range(3) for j in range(3)]