deletions | additions       diff --git a/figures/nfft_discretization1/caption.tex b/figures/nfft_discretization1/caption.tex  index d9ad88c..6b0165d 100644  --- a/figures/nfft_discretization1/caption.tex  +++ b/figures/nfft_discretization1/caption.tex 
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space partitions corresponding to Fig.~\ref{fig:pes_sheme}.  Owing to the discretization of the Fourier integrals, periodic conditions are imposed at the boundaries and  the wavepacket wraps around the edges of the simulation box (red).   The time evolution is portrayed together with a momentum space momentum-space  representation (yellow), with spacing $\Delta k$ and maximum momentum $k_{\rm max}$, in three situations differing in the strategy used to map real and  momentum spaces:(a) Fast Fourier Transform (FFT), (b) FFT extended with zeros (zero padding) in a box enlarged   by a factor $\alpha$, and (c) zero padding with NFFT.