Comment on Can you be sure to clear a line at Tetris?parentComments−a3_nmOP4yFurther, for metric TSP, an approximation algorithm with a slightly better ratio was found, and received a best paper award at STOC'21. See the second paragraph of https://en.wikipedia.org/wiki/Christofides_algorithm.
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Further, for metric TSP, an approximation algorithm with a slightly better ratio was found, and received a best paper award at STOC'21. See the second paragraph of https://en.wikipedia.org/wiki/Christofides_algorithm.