35 / 10 : add subtitles for differential equations

Clean ipynb 560be29

35_sympy/10_sympy.ipynb

@@ -1811,7 +1811,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## 미분방정식<br>Differential Equations\n",
+    "## Differential Equations<br>미분방정식\n",
     "\n"
    ]
   },
@@ -1872,7 +1872,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Free Vibration of a Mechanical System<br>기계시스템의 자유진동\n",
+    "### Free Vibration of a Mechanical System<br>기계시스템의 자유진동\n",
     "\n"
    ]
   },
@@ -1915,7 +1915,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Initial conditions<br>초기조건\n",
+    "#### **Initial** conditions<br>초기조건\n",
     "\n"
    ]
   },
@@ -2005,7 +2005,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Substitution approach<br>대입법\n",
+    "#### Substitution approach<br>대입법\n",
     "\n"
    ]
   },
@@ -2143,7 +2143,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Forced Vibration<br>강제진동\n",
+    "### Forced Vibration<br>강제진동\n",
     "\n"
    ]
   },
@@ -2232,8 +2232,9 @@
  ],
  "metadata": {
   "colab": {
-   "include_colab_link": true,
-   "provenance": []
+   "provenance": [],
+   "toc_visible": true,
+   "include_colab_link": true
   },
   "kernelspec": {
    "display_name": "Python 3 (ipykernel)",
@@ -2254,5 +2255,5 @@
   }
  },
  "nbformat": 4,
- "nbformat_minor": 4
+ "nbformat_minor": 0
 }