updating DIRECTORY.md

Author: cclauss

DIRECTORY.md

@@ -522,6 +522,7 @@
 
 ## [Fractals](fractals)
   * [Barnsley Fern](fractals/barnsley_fern.py)
+  * [Hilbert Curve](fractals/hilbert_curve.py)
   * [Julia Sets](fractals/julia_sets.py)
   * [Koch Snowflake](fractals/koch_snowflake.py)
   * [Mandelbrot](fractals/mandelbrot.py)
@@ -699,7 +700,7 @@
   * [Gradient Descent](machine_learning/gradient_descent.py)
   * [K Means Clust](machine_learning/k_means_clust.py)
   * [K Medoids](machine_learning/k_medoids.py)
-  * [K Nearest Neighbours](machine_learning/k_nearest_neighbours.py)
+  * [K Nearest Neighbors](machine_learning/k_nearest_neighbors.py)
   * [Linear Discriminant Analysis](machine_learning/linear_discriminant_analysis.py)
   * [Linear Regression](machine_learning/linear_regression.py)
   * [Linear Regression Vectorized](machine_learning/linear_regression_vectorized.py)
@@ -710,9 +711,11 @@
   * Lstm
     * [Lstm Prediction](machine_learning/lstm/lstm_prediction.py)
   * [Mfcc](machine_learning/mfcc.py)
+  * [Mini Batch Gradient Descent](machine_learning/mini_batch_gradient_descent.py)
   * [Multilayer Perceptron Classifier](machine_learning/multilayer_perceptron_classifier.py)
   * [Polynomial Regression](machine_learning/polynomial_regression.py)
   * [Principle Component Analysis](machine_learning/principle_component_analysis.py)
+  * [Q Learning](machine_learning/q_learning.py)
   * [Random Forest Classifier](machine_learning/random_forest_classifier.py)
   * [Random Forest Regressor](machine_learning/random_forest_regressor.py)
   * [Scoring Functions](machine_learning/scoring_functions.py)
@@ -742,6 +745,7 @@
   * [Binary Multiplication](maths/binary_multiplication.py)
   * [Binomial Coefficient](maths/binomial_coefficient.py)
   * [Binomial Distribution](maths/binomial_distribution.py)
+  * [Binomial Expansion](maths/binomial_expansion.py)
   * [Ceil](maths/ceil.py)
   * [Chebyshev Distance](maths/chebyshev_distance.py)
   * [Check Polygon](maths/check_polygon.py)
@@ -784,6 +788,7 @@
   * [Interquartile Range](maths/interquartile_range.py)
   * [Is Int Palindrome](maths/is_int_palindrome.py)
   * [Is Ip V4 Address Valid](maths/is_ip_v4_address_valid.py)
+  * [Is Ipv6 Address Valid](maths/is_ipv6_address_valid.py)
   * [Is Square Free](maths/is_square_free.py)
   * [Jaccard Similarity](maths/jaccard_similarity.py)
   * [Joint Probability Distribution](maths/joint_probability_distribution.py)
@@ -856,6 +861,7 @@
   * [Radix2 Fft](maths/radix2_fft.py)
   * [Recursive Digit Sum](maths/recursive_digit_sum.py)
   * [Remove Digit](maths/remove_digit.py)
+  * [Reverse Factorial Recursive](maths/reverse_factorial_recursive.py)
   * [Segmented Sieve](maths/segmented_sieve.py)
   * Series
     * [Arithmetic](maths/series/arithmetic.py)