Update README.md

README.md

@@ -36,7 +36,7 @@ When solving GR PDEs in spherical symmetry or even axisymmetry, the requirements
   - [ ] Compute quasinormal modes for the Schwarzschild black hole using the Regge-Wheeler-Zerilli equation.
     - [ ] Continued fraction method to determine the eigenvalue
     - [x] Ultraspherical spectral method in hyperboloidal coordinates to determine the eigenfunction.
-  - [ ] Compute quasinormal modes for the Teukolsky equation using the continued fraction method. Apply the Cook-Zalutskiy spectral approach for the angular sector to determine the eigenvalue and the ultraspherical spectral method in hyperboloidal coordinates to determine the eigenfunction.
+  - [x] Compute quasinormal modes for the Teukolsky equation using the continued fraction method. Apply the Cook-Zalutskiy spectral approach for the angular sector to determine the eigenvalue and the ultraspherical spectral method in hyperboloidal coordinates to determine the eigenfunction.
     - [x] Continued fraction method to solve the radial equation
     - [x] Ultraspherical spectral method in hyperboloidal coordinates to determine the eigenfunction.