Infrared LF binned data of Figure 2 (black circles with error bars) with the best-fit functional forms overlayed. The modified Schechter fits with α and σ parameters (Equation A.1) allowed to vary freely are depicted with blue solid line. Fixing α and σ at the recent literature values of -0.2 and 0.5, respectively (Gruppioni et al. 2013; Wang et al. 2019; Gruppioni et al. 2020; Traina et al. 2024), produces the modified Schechter function presented with the red dashed line, while the best-fit classical Schechter curve (Equation 6) derived in this work is shown with the black dotted line.