update

index.md

@@ -62,7 +62,7 @@ Each <span class="my_blue">lengthscale</span> is inversely proportional to the s
 <img src="./assets/weak_strong_force.svg" alt="drawing" width="100%" max-width="1000px">
 
 </div>
-- Use PCA to get the <span class="my_blue">eigenvalues</span> and <span class="my_red">eigenvectors</span> of the training data: \\(\\{{\\color{red}\mathbf{u}\_d},{\\color[RGB]{68,114,196}\lambda\_d}\\}\_{d=1}^D\\)
+- Use PCA to get the <span class="my_blue">eigenvalues</span> and <span class="my_red">eigenvectors</span> of the training data: \\(\\{ {\color{red}\mathbf{u}\_d},{\color[RGB]{68,114,196}\lambda\_d}\\}\_{d=1}^D\\)
 - Define the base kernel:
 
 <img src="./assets/pca_kernel.svg" alt="drawing" width="80%" max-width="800px">