Random triples
| Subject | Object |
|---|---|
| gptkb:Discrete-Time_Fourier_Transform_(DTFT) | x[n] = (1/2π) ∫_{-π}^{π} X(e^{jω}) e^{jωn} dω |
| gptkb:Pentagonal_numbers | n = (sqrt(24x+1)+1)/6 |
| gptkb:Stereographic_Projection | θ = 2 arctan(r/R), φ = arctan2(y, x) |
| gptkb:Fisher_transformation | r = (e^{2z} - 1) / (e^{2z} + 1) |
| gptkb:Discrete_Time_Fourier_Series | x[n] = sum_{k=0}^{N-1} X[k] e^{j(2π/N)kn} |