#!/usr/bin/env python
# coding: utf-8

# # Chapter -1

# This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project.
# 
# $ x^{2} + y^{2} + z^{2} = a^{2}$

# ##  This is Subtitle

# In[2]:


import numpy as np
import matplotlib.pyplot as plt


# ### This is sub-sub title

# This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project. This is a paragraph. Describe about the chapter/project.
# 
# **This plot is from internet:**
# 
# ![img](https://miro.medium.com/max/1200/0*l7K8IfdnGGMhdtF7.png)
# [Image Courtesy or Name et. al.,arxive:12345](https://miro.medium.com/max/1200/0*l7K8IfdnGGMhdtF7.png)

# **This plot is from local computer**
# 
# ![img](graph.png)
# 
# 

# In[ ]: