It is a low-research time of year! But a highlight today was the PhD candidacy exam of Shengqi Yang (NYU), who is working with Anthony Pullen (NYU) on new data analysis techniques for cosmology. She is doing a number of things, but the part I am most interested in is manipulation of combinations of cross- and auto-correlation functions to determine other cross- and auto-correlation functions. These combinations are very simple and valuable! And you can combine observed and theoretical functions as you see fit. I got an argument started in the room about the conditions under which these relationships are exact, or true in the limit, or approximations. I would like to understand that better!
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