Recent research has emphasized the benefits of accurately reconstructing the initial
Lagrangian positions of biased tracers from their positions at a later time, to gain …

We present a cosmic density field reconstruction method that augments the traditional
reconstruction algorithms with a convolutional neural network (CNN). Following previous …

The reconstruction method has been widely employed to improve the baryon acoustic
oscillations (BAO) measurement in spectroscopic survey data analysis. In this study, we …

The linear point (LP) standard ruler was identified as the basis of a purely geometric method
for exploiting the baryon acoustic oscillations (BAO). The LP exploits the BAO feature …

We study Monge-Ampère gravity (MAG) as an effective theory of cosmological structure
formation through optimal transport theory. MAG is based on the Monge-Ampère equation, a …

The spectroscopic survey of the China's Space Survey Telescope (CSST) is expected to
obtain a huge number of slitless spectra, including more than one hundred million galaxy …

Reconstructing the galaxy peculiar velocity field from the distribution of large-scale structure
plays an important role in cosmology. On one hand, it gives us an insight into structure …

We study the quantitative stability of the mapping that to a measure associates its
pushforward measure by a fixed (non-smooth) optimal transport map. We exhibit a tight …

In analytical models of structure formation, protohaloes are routinely assumed to be peaks of
the smoothed initial density field, with the smoothing filter being spherically symmetric. This …

ABSTRACT The Linear Point (LP), defined as the mid-point between the baryon acoustic
oscillation (BAO) peak and the associated left dip of the two-point correlation function …