save your eyes dont look at this code
some links http://www.aiportal.ru/articles/neural-networks/perceptron-learning.html http://www.intuit.ru/studies/courses/88/88/lecture/20531?page=2 http://www.mini.pw.edu.pl/~mandziuk/PRACE/TSP_DM.pdf https://books.google.ru/books?id=jaoDX9-e_McC&hl=ru&source=gbs_slider_cls_metadata_9_mylibrary