constructivism

[kənˈstrʌktɪˌvɪzəm]
n
a movement in abstract art evolved in Russia after World War I, primarily by Naum Gabo, the Russian-born US sculptor (1890--1977), which explored the use of movement and machine-age materials in sculpture and had considerable influence on modern art and architecture
the theory that mathematical entities do not exist independently of our construction of themSee intuitionism See finitism