# What are the differences between the Fourier and Laplace transforms?

## What are the differences between the Fourier and Laplace transforms?

Fourier transform is defined only for functions defined for all the real numbers, whereas Laplace transform does not require the function to be defined on set the negative real numbers. Every function that has a Fourier transform will have a Laplace transform but not vice-versa.

## What is Laplace and Fourier transformation?

The Laplace transform is similar to the Fourier transform. While the Fourier transform of a function is a complex function of a real variable (frequency), the Laplace transform of a function is a complex function of a complex variable.

**What is difference between Fourier and Fourier integrals?**

Fourier transform of a function f is the function Ff defined by Ff(ω)=12π∫∞−∞f(t)e−iωtdt . Fourier integral is any integral of the form ∫∞−∞y(ω)eiωtdω .

### Which came first Laplace or Fourier?

Fourier Transformation was invented in 1822, but it went through several researches in the next 70-80 years or so. Laplace Transformation was invented somewhere between 1782-85, but was the refinement of concepts originally started by Leonhard Euler in 1744.

### Which is better Laplace or Fourier?

Laplace transform is normally used for system Analysis,where as Fourier transform is used for Signal Analysis. The Fourier transform does not really care on the changing magnitudes of a signal, whereas the Laplace transform ‘care’ both the changing magnitudes (exponential) and the oscillation (sinusoidal) parts.

**What is S in Laplace transform?**

In mathematics and engineering, the s-plane is the complex plane on which Laplace transforms are graphed. It is a mathematical domain where, instead of viewing processes in the time domain modeled with time-based functions, they are viewed as equations in the frequency domain.

#### What are the applications of Laplace Transform?

Laplace transform is an integral transform method which is particularly useful in solving linear ordinary dif- ferential equations. It finds very wide applications in var- ious areas of physics, electrical engineering, control engi- neering, optics, mathematics and signal processing.

#### What is the point of Laplace Transform?

The purpose of the Laplace Transform is to transform ordinary differential equations (ODEs) into algebraic equations, which makes it easier to solve ODEs.

**Why do we use Fourier?**

The Fourier Transform is an important image processing tool which is used to decompose an image into its sine and cosine components. The Fourier Transform is used in a wide range of applications, such as image analysis, image filtering, image reconstruction and image compression.

## Why is Laplace better than Fourier?

Laplace transforms can capture the transient behaviors of systems. Fourier transforms only capture the steady state behavior. Of course, Laplace transforms also require you to think in complex frequency spaces, which can be a bit awkward, and operate using algebraic formula rather than simply numbers.