“…The application of 1 -minimization for computing sparse polynomial approximations of functions was first considered in [18,39,65,79,97]. This led to substantial amounts of subsequent research, including [3,4,13,14,19,26,26,43,44,52,55,57,63,74,76,78,81,86,90,91,94,95,[98][99][100][101][102]. Specific extensions to weighted and lower sparsity models were developed in [1-3, 5, 9, 25, 75, 80, 99].…”