The perspective of a function $f : \mathbb{R}^n \to \mathbb{R}$ is the function $g: \mathbb{R}^n \times \mathbb{R} \to \mathbb{R}$ where $g$ is defined as $$g(x,t) = tf(x/t)$$ with $$\mathbf{\text{dom}}\, g = \{(x, t) : x/t \in \mathbf{\text{dom}}\, f, \,t > 0\}.$$

If I'm modeling a convex constraint of the form $g(x,t) \leq 0$ in a convex solver software, how do I ensure the domain constraint $t>0$ is satisfied? I tried $t \geq 0$, but for some problems, my $t^* = 0$.


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