NEW YORK, Nov 9: New evidence of the authenticity of a drip painting said by some to be abstract expressionist Jackson Pollock’s final work, was presented at a conference of art experts yesterday. The painting, including polar bear hairs trapped in the paint that match a pelt rug from his studio, is owned by Ruth Kligman, an artist who was Pollock’s mistress and the only one to survive when a drunken Pollock crashed his car in which she and a friend were riding in 1956. (agencies)