Mexicana de Aviación to prove the group has the intention to buy Mexicana Airlines. As of 2013, Med Atlantic and Grupo Fides are still trying to invest money in Mexicana Airlines. On Friday April 4, 2014 Federal Judiciary Council announced that a judge declared the end of the bankruptcy proceedings due to a lack of credible investors. In 2015, many of Mexicana's former oneworld partners signed codeshare agreements with Interjet, one of Mexicana's ex-main rivals. The alliance has stated that it's interested in recruiting a new airline from Mexico. This would fill in the void left by Mexicana in 2010. Mexicana was listed
S transform S transform S transform as a time–frequency distribution was developed in 1994 for analyzing geophysics data. In this way, the "S" transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages. For one, modulation sinusoids are fixed with respect to the time axis; this localizes the scalable Gaussian window dilations and translations in "S" transform. Moreover, the "S" transform doesn't have a cross-term problem and yields a better signal clarity than Gabor transform. However, the "S" transform has its own disadvantages: the clarity is worse than Wigner distribution function