New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

contour integration #67

Closed

stevengj opened this issue Feb 7, 2023 · 1 comment

Labels

bug

Member

stevengj commented Feb 7, 2023

I thought this was supported, but then this integral should give 2πi by the residue theorem:

julia> quadgk(z -> cos(z)/z, 1, im, -1, -im)
(0.50046301807924 + 4.71238898038469im, 4.027482497221434e-9)

and the result looks clearly wrong. 😢

stevengj added the bug label

Member Author

stevengj commented Feb 7, 2023

Oh, nevermind, I forgot to close the contour by ending up back at z=1:

julia> quadgk(z -> cos(z)/z, 1, im, -1, -im, 1)
(0.0 + 6.283185307179587im, 5.369976662961913e-9)

stevengj closed this as completed

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment