clarification

psets/pset5.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "fd786915",
+   "id": "701e5077",
    "metadata": {},
    "source": [
     "# 18.065 Problem Set 5\n",
@@ -12,7 +12,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ff18eab8",
+   "id": "74f502b8",
    "metadata": {},
    "source": [
     "## Problem 1 (5+6 points)\n",
@@ -32,7 +32,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "87b4dd84",
+   "id": "3a49c4b1",
    "metadata": {},
    "source": [
     "## Problem 2 (5+6+6 points)\n",
@@ -67,7 +67,7 @@
   {
    "cell_type": "code",
    "execution_count": 38,
-   "id": "e95087fb",
+   "id": "1a89466c",
    "metadata": {},
    "outputs": [
     {
@@ -97,7 +97,7 @@
   {
    "cell_type": "code",
    "execution_count": 52,
-   "id": "cb117722",
+   "id": "e5a615e1",
    "metadata": {},
    "outputs": [
     {
@@ -117,12 +117,12 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ba18e276",
+   "id": "7878762b",
    "metadata": {},
    "source": [
     "## Problem 3 (5+5+6 points)\n",
     "\n",
-    "Solve the optimization problem from 2c above, with the same parameters, by implementing ADMM for the problem\n",
+    "In this problem, you will use ADMM to solve the (primal) optimization problem from problem 2 above, for the parameters from problem 2c, using the equivalent formulation:\n",
     "$$\n",
     "\\min_{x \\in \\mathbb{R}^n} \\left( \\Vert b - Ax \\Vert_2^2 + \\begin{cases} 0 & \\Vert x \\Vert_2 \\le r \\\\ \\infty & \\mbox{otherwise} \\end{cases} \\right)\n",
     "$$\n",
@@ -138,8 +138,16 @@
     "\n",
     "**(b)** Give a closed-form solution for step 2.\n",
     "\n",
-    "**(c)** Implement this iteration in Julia to solve problem 2c, starting from $x = z = s = \\vec{0}$.   Make a (semi-log) plot of the error $\\Vert x^{(k)} - x_* \\Vert_2$ versus $k$, where $x_*$ is your solution from 2c, for $\\rho = 1$ and $\\rho = 10$.  (The error should converge to zero!)"
+    "**(c)** Implement this iteration in Julia to solve this problem with the parameters from 2c above, starting from $x = z = s = \\vec{0}$.   Make a (semi-log) plot of the error $\\Vert x^{(k)} - x_* \\Vert_2$ versus $k$, where $x_*$ is your solution from 2c, for $\\rho = 1$ and $\\rho = 10$.  (The error should converge to zero!)"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cfb0991c",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {