Harmonic Functions and Integrating Along Curves: The Role of 90 Degree Rotations

In summary, integrating along a curve is a mathematical tool used to find the area under a curve by breaking it into smaller segments. The steps involved include determining limits of integration, dividing the curve, and summing up the areas of the segments. Commonly used methods include Riemann sum, trapezoidal rule, and Simpson's rule. It has various applications in fields such as physics, engineering, and economics. Some challenges include accurately dividing the curve and dealing with complex or non-closed form curves.
  • #1
lavinia
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If f is a smooth function defined on the plane then the integral of its gradient over any closed curve is zero.

What about the integral of the 90 degree rotation of the gradient?

In symbols, if grad f = (df/dx , df/dy) its 90 degree rotation is

(-df/dy , df/dx)
 
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  • #2
oops I got the answer. The function has to be harmonic.
 

FAQ: Harmonic Functions and Integrating Along Curves: The Role of 90 Degree Rotations

What is the concept of integrating along a curve?

Integrating along a curve is the process of finding the area under a curve by breaking it up into smaller sections and summing them up. It is a mathematical tool used in physics and engineering to calculate quantities such as work, displacement, and force.

What are the steps involved in integrating along a curve?

The first step is to determine the limits of integration, which are the starting and ending points along the curve. Then, the curve is divided into smaller segments and the area of each segment is calculated. Finally, the areas of the segments are added up to find the total area under the curve.

What are the different methods of integrating along a curve?

The most commonly used methods include the Riemann sum, trapezoidal rule, and Simpson's rule. These methods differ in how they approximate the area under the curve by using different shapes and techniques.

What are some applications of integrating along a curve?

Integrating along a curve is used in various fields such as physics, engineering, and economics. It can be used to calculate work done by a force, displacement of an object, and the area under a demand curve.

What are some common challenges when integrating along a curve?

One of the main challenges is accurately dividing the curve into smaller segments. This requires knowledge of the function and its behavior. Another challenge is dealing with curves that have complex shapes or do not have a closed form solution, which may require the use of numerical methods.

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