Chebyshev polynomial - Githubissues

liyaguang / DCRNN

Implementation of Diffusion Convolutional Recurrent Neural Network in Tensorflow

MIT License

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Chebyshev polynomial #61

Closed meirena123 closed 3 years ago

meirena123 commented 3 years ago

I just saw you use this picture when answering other people's questions.

There seems to be a problem with the coefficient in the formula in the appendix of your paper。 The coefficient of the first term on the right side of the equation below seems to be wrong, because the coefficient in your code is 2.

liyaguang commented 3 years ago

Thanks for the kind efforts in identifying the issue. This is a typo in the Appendix, and the correct recurrence formula should be: $T_k(x)=2xT_{k-1}(x)-T_{k-2}(x)$ with the coefficient being 2x instead of x, which aligns with the implementation.