Complex sentence: Richter has simultaneously produced abstract and photorealistic painted works, as well as photographs and glass pieces, thus following the examples of Picasso and Jean Arp in undermining the concept of the artist's obligation to maintain a single cohesive style.
Split into simpler sentences: Richter has simultaneously produced abstract and photorealistic painted works, as well as photographs and glass pieces. His art follows the examples of Picasso and Jean Arp in undermining the concept of the artist's obligation to maintain a single cohesive style.