diff --git a/Math/Matrix/Matrix.php b/Math/Matrix/Matrix.php
index 0522f96a5..ab9abb1a4 100755
--- a/Math/Matrix/Matrix.php
+++ b/Math/Matrix/Matrix.php
@@ -316,7 +316,7 @@ class Matrix implements \ArrayAccess, \Iterator
         $isSymmetric = true;
         for ($j = 0; ($j < $this->m) & $isSymmetric; ++$j) {
             for ($i = 0; ($i < $this->n) & $isSymmetric; ++$i) {
-                $isSymmetric = ($this->matrix[$i][$j] === $this->matrix[$j][$i]);
+                $isSymmetric = \abs($this->matrix[$i][$j] - $this->matrix[$j][$i]) < self::EPSILON;
             }
         }
 
diff --git a/Utils/Parser/Markdown/Markdown.php b/Utils/Parser/Markdown/Markdown.php
index d548f0d31..8a26a8f01 100755
--- a/Utils/Parser/Markdown/Markdown.php
+++ b/Utils/Parser/Markdown/Markdown.php
@@ -2088,7 +2088,7 @@ class Markdown
 
             $Block['element']['attributes'] = $this->parseAttributeData($attributeString);
 
-            $Block['element']['handler']['argument'] = \substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
+            $Block['element']['handler']['argument'] = \substr($Block['element']['handler']['argument'], 0, (int) $matches[0][1]);
         }
 
         return $Block;
@@ -2207,7 +2207,7 @@ class Markdown
 
             $Block['element']['attributes'] = $this->parseAttributeData($attributeString);
 
-            $Block['element']['handler']['argument'] = \substr($Block['element']['handler']['argument'], 0, $matches[0][1]);
+            $Block['element']['handler']['argument'] = \substr($Block['element']['handler']['argument'], 0, (int) $matches[0][1]);
         }
 
         return $Block;
@@ -4022,7 +4022,7 @@ class Markdown
 
         while (\preg_match($regexp, $text, $matches, \PREG_OFFSET_CAPTURE))
         {
-            $offset = $matches[0][1];
+            $offset = (int) $matches[0][1];
             $before = \substr($text, 0, $offset);
             $after  = \substr($text, $offset + \strlen($matches[0][0]));