Uttar Pradesh politicians Mayawati and Akhilesh Yadav greeted each other warmly, waved to the crowds and sat next to each other as they arrived on stage for the swearing-in ceremony of Janata Dal Secular leader HD Kumaraswamy as Karnataka Chief Minister. The rivals turned allies were seen together on a public stage for the first time since they buried their differences to collaborate in recent by-polls in Uttar Pradesh.