Constructive Set Theory/aczels Constructive Zermelo%e2%80%93fraenkel

Famous quotes containing the words constructive, set and/or theory:

    Work is a responsibility most adults assume, a burden at times, a complication, but also a challenge that, like children, requires enormous energy and that holds the potential for qualitative, as well as quantitative, rewards. Isn’t this the only constructive perspective for women who have no choice but to work? And isn’t it a more healthy attitude for women writhing with guilt because they choose to compound the challenges of motherhood with work they enjoy?
    Melinda M. Marshall (20th century)

    it pleaseth me when I see through the meadows
    The tents and pavilions set up, and great joy have I
    When I see o’er the campana knights armed and horses arrayed.

    And it pleaseth me when the scouts set in flight the folk with
    their goods;
    And it pleaseth me when I see coming together after them an host of
    armed men.
    Bertrans De Born (fl. 12th century)

    Won’t this whole instinct matter bear revision?
    Won’t almost any theory bear revision?
    To err is human, not to, animal.
    Robert Frost (1874–1963)