layer site tensor a into a rank-4 tensor with two seam legs (the chi and D^2 legs that connect to the adjacent quarter in the 2x2). Used by ``_ctm_tensor_move_*_2x2`` in ``_ctm_tensor_moves.py``.

Abstract: Class imbalance occurs frequently in machine learning, particularly in binary classification tasks where the majority class has a significantly larger number of samples than the minority ...

Abstract: The advent of artificial intelligence (AI) has catalyzed transformative changes across diverse domains, establishing itself as a disruptive technology. Traditional methods often fall short ...