The conjecture on the minimum eigenvalue derivative for block-Toeplitz symbols
Let deg>0\deg>0deg>0, j>0j>0j>0, and z>0z>0z>0. Let f^z,j\hat{f}_{z,j}f^z,j be the symbol appearing in the paper, and let λ”min(f^z,j)∣0\lambda”_{\rm \min}(\hat{f}_{z,j})|_{0}λ”min(f^z,j)∣0 denote the second derivative at 000 of it…