<span class="hljs-meta">@meta</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">C</span>: <span class="hljs-meta"> @decorator</span> <span class="hljs-keyword">def</span> <span class="hljs-title function_">f</span>(<span class="hljs-params">self, H, V, beta, r</span>): S = (H @ beta - r).T @ inv(H @ V @ H.T) @ (H @ beta - r) <span class="hljs-keyword">return</span> S