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diff --git a/vendor/markbaker/complex/classes/src/functions/abs.php b/vendor/markbaker/complex/classes/src/functions/abs.php
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+<?php
+
+/**
+ *
+ * Function code for the complex abs() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the absolute value (modulus) of a complex number.
+ * Also known as the rho of the complex number, i.e. the distance/radius
+ *   from the centrepoint to the representation of the number in polar coordinates.
+ *
+ * This function is a synonym for rho()
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The absolute (or rho) value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ *
+ * @see    rho
+ *
+ */
+if (!function_exists(__NAMESPACE__ . '\\abs')) {
+    function abs($complex): float
+    {
+        return rho($complex);
+    }
+}