Comment Re:What do you call (Score 1) 640
In general, a tensor.
In general, a tensor.
It's pretty standard notation in the type II superconductor world. The 4 digits refer to the relative stoichiometry of the various cells in the lattice. I agree it's not too useful in this context.
"It is better to have tried and failed than to have failed to try, but the result's the same." - Mike Dennison