Path Genetic Algorithm to Solve the Traveling Salesperson Problem by James Pate Williams, Jr.

I have been interested in solving the Traveling Salesperson problem (TSP) since the early 2000’s. I have used several evolutionary techniques. This blog will cover my implementation of a path genetic algorithm created by me in 2017. Of course, the world’s best TSP solver is the University of Waterloo Conrcorde:

https://www.math.uwaterloo.ca/tsp/concorde.html

which now uses a linear programming solver. I used the programming language C# in my implementations.

The previous graph reminds me of John Travolta dancing to the Bee Gees hit song “Staying Alive”.

The previous data for a 127-city tour is not optimal.

The left length is 123,004 and the right length is 121,697. I don’t know if the right length is optimal. The tour in the literature is bier-127.

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Author: jamespatewilliamsjr

My whole legal name is James Pate Williams, Jr. I was born in LaGrange, Georgia approximately 70 years ago. I barely graduated from LaGrange High School with low marks in June 1971. Later in June 1979, I graduated from LaGrange College with a Bachelor of Arts in Chemistry with a little over a 3 out 4 Grade Point Average (GPA). In the Spring Quarter of 1978, I taught myself how to program a Texas Instruments desktop programmable calculator and in the Summer Quarter of 1978 I taught myself Dayton BASIC (Beginner's All-purpose Symbolic Instruction Code) on LaGrange College's Data General Eclipse minicomputer. I took courses in BASIC in the Fall Quarter of 1978 and FORTRAN IV (Formula Translator IV) in the Winter Quarter of 1979. Professor Kenneth Cooper, a genius poly-scientist taught me a course in the Intel 8085 microprocessor architecture and assembly and machine language. We would hand assemble our programs and insert the resulting machine code into our crude wooden box computer which was designed and built by Professor Cooper. From 1990 to 1994 I earned a Bachelor of Science in Computer Science from LaGrange College. I had a 4 out of 4 GPA in the period 1990 to 1994. I took courses in C, COBOL, and Pascal during my BS work. After graduating from LaGrange College a second time in May 1994, I taught myself C++. In December 1995, I started using the Internet and taught myself client-server programming. I created a website in 1997 which had C and C# implementations of algorithms from the "Handbook of Applied Cryptography" by Alfred J. Menezes, et. al., and some other cryptography and number theory textbooks and treatises.

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