Table 1.
Notations and symbols
| ∘ | outer product |
| ⊚ | Khatri-Rao product |
| R | number of ranks |
| N | number of modes (order) |
| K | number of hospitals |
| A, B | matrix |
| 𝒳, 𝒪 | tensor |
| O(n) | matricized tensor of 𝒪 on nth mode |
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