diff --git a/Cryptography/RSA.md b/Cryptography/RSA.md
index f9dae63..246903f 100644
--- a/Cryptography/RSA.md
+++ b/Cryptography/RSA.md
@@ -4,7 +4,7 @@
 * Coprime Phi is calculated either by [Euler Totient](https://en.wikipedia.org/wiki/Euler's_totient_function) or [greatest common divisor](https://en.wikipedia.org/wiki/Greatest_common_divisor) via [euclidean algorithm](https://crypto.stanford.edu/pbc/notes/numbertheory/euclid.html) 
 
 $$
-1 < $\phi$ < n
+1 < \phi < n
 $$
 
 * There is also