Update README.md

README.md

@@ -41,7 +41,11 @@ $$
 
 where:
 
-- <img src="https://latex.codecogs.com/svg.image?\;x\in\mathbb{R}^{d_{in}}\" /> is the input vector (or each sample in a batch).
+$$
+\( x \in \mathbb{R}^{d_{in}} \)
+$$
+is the input vector (or each sample in a batch).
+
 - <img src="https://latex.codecogs.com/svg.image?\;W\in\mathbb{R}^{d_{out}\times&space;d_{in}}\" /> is the fixed pre-trained weight matrix.
 - <img src="https://latex.codecogs.com/svg.image?\;\Delta&space;y\" /> is the differential update computed as: