(x,t,y) == exponential include the case of x=0? Uncategorized Aug 28, 2016 F Feng Wang Aug 28, 2016 #1 whether (0,t,0) in the exp_cone defined in CVX? M Mark L. Stone Aug 28, 2016 #2 t must be > 0, so for (0,t,0) to be in the exponential cone would require t * exp(0/t) <= 0 which is not the case. F Feng Wang Aug 28, 2016 #3 Understand. Thank you so much.