diff --git a/education/computer engineering/circuits/units/Ohm.md b/education/computer engineering/circuits/units/Ohm.md
index da3764f..5612492 100644
--- a/education/computer engineering/circuits/units/Ohm.md	
+++ b/education/computer engineering/circuits/units/Ohm.md	
@@ -4,5 +4,4 @@ The Ohm ($\Omega$) is the unit of resistance and is a measure of a component's o
 In SI units, an ohm is defined as:
 $$ \Omega = kg \cdot m^2 \cdot s^{-3} \cdot A^{-2} $$
 
-For non-linear devices, the differential definition of resistance is:
-$$ r = \frac{d V}{d I} $$
\ No newline at end of file
+# Characteristics