What is the fine-grained topic of the following text: Geli Mikhailovich Korzhev (1925 – 2012) is recognized by contemporary Russian art historians as one of the most influential painters of the second half of the 20th century; his work has influenced the style and subjects of two generations of post-WWII Russian artists. Only return the topic.
Geli Mikhailovich Korzhev's influence on post-WWII Russian art.