diff --git a/docs/src/tensor_prod.md b/docs/src/tensor_prod.md
index 832603cc..c20902c1 100644
--- a/docs/src/tensor_prod.md
+++ b/docs/src/tensor_prod.md
@@ -1,6 +1,6 @@
 # Tensor product function
 The tensor product function is defined as:
-``f(x) = \prod_{i=1}^d \cos(a\pi x_i)``
+``\[ f(x) = ∏ᵢ=₁ᵈ cos(aπxᵢ) \]``
 
 Let's import Surrogates and Plots:
 ```@example tensor