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math.AP2021
A simple construction of potential operators for compensated compactness
Bogdan Raiţă
We give a short proof of the fact that each homogeneous linear differential operator of constant rank admits a homogeneous potential operator , meaning that $\ker A(x)=\math…
math.AP2021
Concentration effects of BV gradients have gradient structure
Jan Kristensen, Bogdan Raiţă
We prove that the concentration effects arising from weakly-* convergent sequences of gradients of maps of bounded variation have gradient structure. This is in stark contrast with…