Emma Hart and Mat Collishaw: this week’s best UK exhibitions
Abstraction is still the most challenging invention of the modern age. Readymades can be assimilated to the still life and performance art is ultimately just theatre. Abstract paintings, however, pose the same unresolvable question now that they did in the days of Mondrian: how can a non-representational work of art mean anything? Joachim Grommek, Markus Linnenbrink, Adrian Esparza, Jan van der Ploeg, Markus Weggenmann, Beat Zoderer and Jonathan Parsons keep up this great and radical tradition.
New Art Projects, E8, to 26 August