diff --git a/docs/en/mathematics/logic.md b/docs/en/mathematics/logic.md
index 8375842..9642f65 100644
--- a/docs/en/mathematics/logic.md
+++ b/docs/en/mathematics/logic.md
@@ -4,14 +4,16 @@
-*Definition* **- Logical operators**: let $A$ and $B$ be assertions.
-* The assertion $A$ and $B$ ($A \land B$) is true, iff both $A$ and $B$ are true.
-* The assertion $A$ or $B$ ($A \lor B$) is true, iff at least one of $A$ and $B$ is true.
-* The negation of $A$ ($\neg A$) is true iff $A$ is false.
+> *Definition* **- Logical operators**: let $A$ and $B$ be assertions.
+>
+> * The assertion $A$ and $B$ ($A \land B$) is true, iff both $A$ and $B$ are true.
+> * The assertion $A$ or $B$ ($A \lor B$) is true, iff at least one of $A$ and $B$ is true.
+> * The negation of $A$ ($\neg A$) is true iff $A$ is false.
*Definition* **- Implies**: if $A$ and $B$ are assertions then the assertion if $A$ then $B$ ($A \implies B$) is true iff
+
* $A$ is true and $B$ is true,
* $A$ is false and $B$ is true,
* $A$ is false and $B$ is false.
@@ -21,6 +23,7 @@ This also works the opposite way, if $B$ then $A$ ($A \Longleftarrow B$)
*Definition* **- If and only if**: if $A$ and $B$ are assertions then the assertion $A$ if and only if $B$ (A \iff B) is true iff
+
* $(A \Longleftarrow B) \land (a \implies B)$.
: This leads to the following table.