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diff --git a/Readme.md b/Readme.md
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@@ -6,10 +6,14 @@
   <img src="docs/images/probl.png" height="225"><br>  
 </div>
 
+<div align="center">
+  <img src="docs/images/reg_penalties.jpg" height="300"><br>  
+</div>
+
 ## Prerequisites: 
 
  * [MATLAB](www.mathworks.com/products/matlab/) OR
- * Python (tested ver. 3.5); Cython
+ * Python (tested ver. 3.5/2.7); Cython
  * C compilers
  * nvcc (CUDA SDK) compilers
 
diff --git a/docs/images/reg_penalties.jpg b/docs/images/reg_penalties.jpg
new file mode 100644
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--- /dev/null
+++ b/docs/images/reg_penalties.jpg