Is selection in genetic algorithm considered to be a genetic operator?
One of my first Google hits is a widely-cited article:

Eberhart, Russell C., and Yuhui Shi. "Comparison between genetic algorithms and particle swarm optimization." In International Conference on Evolutionary Programming, pp. 611-616. Springer, Berlin, Heidelberg, 1998.

The third paragraph of the article says:


  Regardless of the specific implementation, it is generally agreed that GAs utilize one form or another of three operators: selection, crossover, and mutation.