Sotheby's Specialist in Modern and Post-War British Art Simon Hucker said: "In Britain in the 60s, we see all the major movements of the post-war period - from Pop, which in many ways we can lay a serious claim to have invented, to Op, gestural abstraction to Hard-Edge and Minimalism.
These ranged from Geometric Abstraction and Hard-Edge painting, in which abrupt transitions are made between areas of different colors; to Color Field, where solid colors are spread to create a flat plane with no brushstrokes; and finally, to Optical Art.
Anna Rubin is represented by a segmented kite, "Shield," recalling hard-edge abstraction and abstract art.
But poetry that possesses a high degree of abstraction is particularly hard to translate (especially, some would add, to a language attuned to empiricism such as English).
Sometimes you throw your arms up and go, 'OK, I can't take this - I'm doing an abstraction!' It's hard, but you just have to stick with it and sometimes you have to start years in advance.
MATT CONNORS In the newcomer Connors's series of off-kilter geometric abstractions, it's hard to know where happenstance begins and ends.
But Marin (1870-1953) pushed abstraction in painting harder than any of his compatriots, and for that he was extravagantly admired by people who mattered.
Its dark blue bulk, not quite but almost an abstraction in its hard-edged rendering, looms against a lighter blue sky in one version and against a white sky mottled with light blue in another.
Yet Kelly's shapes, although pure abstraction, hit you harder than words or symbols could.
The higher the abstraction level, the harder usually it is to parse and map the query on the underlying database schema.
