### Book chapter

## Распределение логарифма сложности индивидуальных задач коммивояжера при фиксированной длине входа/ Probability distribution of the complexity of the individual traveling salesman problem (fixed number of nodes)

It is shown that the logarithm of the complexity (number of nodes in the decision tree of a branch and bound algorithm) of the individual traveling salesman problem is approximately normally distributed. We use a linear regression model (logarithm of the complexity — standard normal distribution) to estimate parameters of normal distribution, which fit the sample. Borders of the interval, which contains 90% of the sample of the logarithm of the complexity, are also given.