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- minor change

Author: ss0832

multioptpy/Optimizer/block_hessian_update.py

@@ -267,8 +267,7 @@ def _block_CFD_FSB_update(self, B, S, Y):
             c_list.append(c)
 
         c_mean = float(np.mean(c_list)) if len(c_list) > 0 else 0.0
-        # Use sqrt weighting as in single-step FSB
-        w = np.sqrt(c_mean)
+        w = c_mean
         Bp = B + w * B_sr1 + (1.0 - w) * B_bfgs
         return symm(Bp)