Here’s a nice write-up by Gil Kalai: https://gilkalai.wordpress.com/2019/05/10/sansation-in-the-morning-news-yaroslav-shitov-counterexamples-to-hedetniemis-conj

Here’s a nice write-up by Gil Kalai: https://gilkalai.wordpress.com/2019/05/10/sansation-in-the-morning-news-yaroslav-shitov-counterexamples-to-hedetniemis-conjecture/ https://gilkalai.wordpress.com/2019/05/10/sansation-in-the-m...