Summary
This chapter covers implementing code to compute antiderivatives (indefinite integrals) and definite integrals symbolically in Python with Sympy, evaluating symbolic expressions at numerical points, and printing the results for visualization.

General domain of usage
Mathematical analysis

## Computing an Indefinite Integral (Antiderivative)

An **indefinite integral** represents the **antiderivative** of a function. It finds the general form of a function whose derivative gives the original function.


import sympy as sp

# Define function
x = sp.Symbol('x')
f = x**2 

# Compute indefinite integral
F = sp.integrate(f, x) 

# Output: x**3 / 3 
print(F) 

## Computing a Definite Integral (Area Under Curve)
A definite integral finds the accumulated sum of a function over a range $$[a,b]$$.

import sympy as sp

# Define function
x = sp.Symbol('x')
f = x**2 

# Define integration limits
a, b = 0, 2

# Compute definite integral
integral_value = sp.integrate(f, (x, a, b)) 

# Output: 8/3 
print(integral_value)

## Common Integrals in Python

Python allows us to compute common mathematical integrals **symbolically**. Here are a few examples:

import sympy as sp

# Define function
x = sp.Symbol('x')

# Exponential integral
exp_integral = sp.integrate(sp.exp(x), x)  

# Sigmoid function integral
sigmoid_integral = sp.integrate(1 / (1 + sp.exp(-x)), x)  

# Quadratic function integral
quadratic_integral = sp.integrate(2*x, (x, 0, 2))

# Print results
print(exp_integral)          # Output: e^x  
print(sigmoid_integral)      # Output: log(1 + e^x)
print(quadratic_integral)    # Output: 4  

This course distills the essentials of Python's math module, focusing on trigonometric functions, logarithmic operations, and mathematical constants. Learners will gain hands-on experience using Python to perform these standard mathematical computations, ideal for beginners seeking practical skills with the math module.

Implementing Integrals in Python

Computing an Indefinite Integral (Antiderivative)

Computing a Definite Integral (Area Under Curve)

Common Integrals in Python