Guggenheim Museum in New York, there’s one little picture that got me through a tough winter: a watercolor in frosted blues, by the Dutch artist Piet Mondrian, of a solitary flower. It’s ...

Even abstract paintings such as Piet Mondrian's 1912 cubist Gray Tree, which doesn’t visually show treelike colours, can be identified as trees if a realistic value for α is used, researchers say.

Piet Mondrian was an early 20th-century abstract artist and art theorist obsessed with simplicity and essence of form. Even people who have never heard of Mondrian will likely recognize his iconic ...