33. 33AR YVARAL (JEAN-PIERRE VASARELY) (1934-2002) Quadrature E 1971 signed; signed, titled, dated 1971 and numbered 1061 on the reverse acrylic on panel 80 x 80 cm. The authenticity of this work has been confirmed by Pierre Vasarely, the only son of Jean-Pierre Vasarely, known as Yvaral, and a member of the French Union of Experts. Provenance Sale at Artcurial, Paris, Post-War & Contemporary 2, 5 June 2014, lot 308 Acquired at this sale by the current owner