Correct typo

src/main/paradox/tiling-definition.md

@@ -12,9 +12,9 @@ where T<sub><i>1</i></sub> , T<sub><i>2</i></sub> , … are known as tiles of 
 
 ※2 **Closed**:  Each tile is enclosed by its boundary. 
 
-※3 **Without gaps**: The union of all the sets T<sub>1</sub> , T<sub>2</sub> , … is to be the whole plane, _i.e._ { T<sub><i>1</i></sub> ∪ T<sub><i>2</i></sub> … ∪ T<sub><i>n</i></sub> } = 𝔼². 
+※3 **Without gaps**: The union of all the sets T<sub>1</sub> , T<sub>2</sub> , … is to be the whole plane, _i.e._ { T<sub><i>1</i></sub> ∪ T<sub><i>2</i></sub> ∪ … ∪ T<sub><i>n</i></sub> } = 𝔼². 
 
-※4 **Without overlaps**: The interior of the sets are to be pairwise disjoint, _i.e._ { int T<sub><i>i</i></sub> ∩ int T<sub><i>j</i></sub> } = ∅,  ∀ (_i_, _j_) where _i_ ≠ _j_.
+※4 **Without overlaps**: The interior of the sets are to be pairwise disjoint, _i.e._ { int T<sub><i>i</i></sub> ∩ int T<sub><i>j</i></sub> } = ∅,  ∀ (<i>i</i>, <i>j</i>) where <i>i</i> ≠ <i>j</i>.
 
 @@@ note
 
@@ -40,7 +40,7 @@ Plus:
 
 ※6 **Polygons**: each tile T<sub><i>i</i></sub> in the tiling is a polygon.
 
-※7 **Edge-to-edge**: each pair of boundaries δT<sub><i>i</i></sub> and δT<sub><i>j</i></sub> in the tiling, ∀ (_i_, _j_) where _i_ ≠ _j_, intersects along a common edge, at a vertex, or none at all.
+※7 **Edge-to-edge**: each pair of boundaries δT<sub><i>i</i></sub> and δT<sub><i>j</i></sub> in the tiling, ∀ (<i>i</i>, <i>j</i>) where <i>i</i> ≠ <i>j</i>, intersects along a common edge, at a vertex, or none at all.
 
 ※8 **Regular polygons**: each tile T<sub><i>i</i></sub> in the tiling is a regular polygon.