I am reading

- imenez, J., Echevarria, J.I., Sousa, T. and Gutierrez, D. (2012),
*SMAA: Enhanced Subpixel Morphological Antialiasing*Computer Graphics Forum, 31: 355-364. https://doi.org/10.1111/j.1467-8659.2012.03014.x

where I have encountered these three equations

\begin{gather*} e_l=\lvert L-L_l\rvert>T \\ c_\text{max} = \max(c_t, c_r,c_l,c_r,c_{2l}) \\ e_{l'}=e_l \land c_l > 0.5 c_\text{max}. \end{gather*}

Because $e_l$ is a number being either 0 or 1, and $c_l$ is always going to be a fraction number, I am wondering what is the AND result of these two? Would it be either 1 or 0 or it is going to be the value of $c_l$ when $e_l$ is 1?

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