%0 Journal Article %A Thomas Chen %A Patricia Muñoz Ewald %T On non-approximability of zero loss global $\mathcal L^2$ minimizers by gradient descent in deep learning %J Theoretical and applied mechanics %D 2025 %P 67 %V 52 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2298/TAM250121008C/ %R 10.2298/TAM250121008C %G en %F 10_2298_TAM250121008C