TimerCovariateMask might not right

[Aurelianooo]

Maybe I was wrong, but i have run your code and results do not match the description in the paper.

The mask generated by TimerCovariateMask is a simple upper triangular matrix, not the same as that shown in paper Figure 2.

[Aurelianooo]

Still dont understand, consider that we have 3 vars and 3 tokens.
Here, A depends on B and C. Isn't the mask supposed to be like what I drew? But the output in the code seems to be different.