This week's journal club:  Anthonny Canazas (UNAB): "Una demostración con funciones signo y simetría conforme 1D" Abstract: The AdS2/CFT1 correspondence has recently drawn a lot of attention in our community. Understanding one-dimensional conformal symmetry is essential in such a scenario. This time we will discuss the expression Σ=sgn(τ1-τ2)+sgn(τ2-τ3)+sgn(τ3-τ4)+sgn(τ4-τ1) which arises in the context of calculating […]