Complex Integration

  • Thread starter kmeado07
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  • #1
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Homework Statement



Evaluate the following intergral:


Homework Equations



Intergral from gamma of (y)dz, where gamma is the union of the line segments joining 0 to i and then i to i+2

The Attempt at a Solution



I have no idea how to do this!
 

Answers and Replies

  • #2
tiny-tim
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Intergral from gamma of (y)dz, where gamma is the union of the line segments joining 0 to i and then i to i+2

Hi kmeado07! :smile:

(have a gamma: Γ :wink:)

Γ is an L-shaped path …

just integrate along each bit of it separately.

(but what is y? :confused:)
 
  • #3
HallsofIvy
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Presumably, if you are expected to do a problem like this, you know something about path integrals. The line from 0 to i, in the complex plane, can be written as z= (1+i)t where t ranges from 0 to 1. The line from i to i+ 2 can be written as z= (1+ t)+ i where, again, t ranges from 0 to 1. Do those two integrals separately with z replace by those and dz by (1+i)dt in the first integral and by dt in the second.

Unfortunately, you see to have forgotten to say what the integrand, y(z), is!
 

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