Update descriptions for Wishart Instances.

notebooks/Example 4 - Wishart Planted Ensemble.ipynb

@@ -13,7 +13,7 @@
     "\n",
     "$$ H = -\\sum_{1\\leq i \\leq j \\leq N} J_{ij}\\sigma_i \\sigma_j$$\n",
     "\n",
-    "where we have an $N \\times N$ matrix for $J$ (which is our spin coupling matrix) and an $N$-dimensional vector $h$ (which serves as our external field terms), along with each spin $\\sigma_i \\in \\{ -1, 1\\}$.  \n",
+    "where we have an $N \\times N$ matrix for $J$ (which is our spin coupling matrix) specifying quadratic terms in the cost potential, along with each spin $\\sigma_i \\in \\{ -1, 1\\}$.  \n",
     "\n",
     "We provide three implementations of the CIM: chaotic amplitude control (CAC), amplitude-heterogeneity correction (AHC), and amplitude-heterogeneity correction with external field terms (AHC). The first two solvers do not have an external field, while the latter requires an external field $h$.\n",
     "\n",