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<math>
<math>
EI(f,\Sigma)\approx \ln\left(\frac{L^n}{(2\pi e)^{n/2}}\right)+\frac{1}{L^n}\int_{[-\frac{L}{2},\frac{L}{2}]^n}\ln\left|\det\left(\frac{\partial_x f(x)}{\Sigma^{1/2}}\right)\right| dx,
EI(f,\Sigma)\approx \ln\left(\frac{L^n}{(2\pi e)^{n/2}}\right)+\frac{1}{L^n}\int_{[-\frac{L}{2},\frac{L}{2}]^n}\ln\left|\det\left(\frac{\partial_{x_t} f(x_t)}{\Sigma^{1/2}}\right)\right| dx,
</math>
</math>
<math>
<math>
\mathcal{J}(f,\Sigma)=\frac{EI(f,\Sigma)}{n}\approx \ln\left(\frac{L}{(2\pi e)^{1/2}}\right)+\frac{1}{L^n}\int_{[-\frac{L}{2},\frac{L}{2}]^n}\ln\left|\det\left(\frac{\partial_x f(x)}{\Sigma^{1/2}}\right)\right|^\frac{1}{n} dx,
\mathcal{J}(f,\Sigma)=\frac{EI(f,\Sigma)}{n}\approx \ln\left(\frac{L}{(2\pi e)^{1/2}}\right)+\frac{1}{L^n}\int_{[-\frac{L}{2},\frac{L}{2}]^n}\ln\left|\det\left(\frac{\partial_{x_t} f(x_t)}{\Sigma^{1/2}}\right)\right|^\frac{1}{n} dx,
</math>
</math>
<math>
<math>
EI(f,\Sigma)\approx \ln\left(\frac{L^n}{(2\pi e)^{n/2}}\right)+
EI(f,\Sigma)\approx \ln\left(\frac{L^n}{(2\pi e)^{n/2}}\right)+\ln\left|\det\left(\frac{\partial_{x_t^*} f(x_t^*)}{\Sigma^{1/2}}\right)\right|,
</math>
</math>