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

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

    “Once we begin to appreciate that the apparent destructiveness of the toddler in taking apart a flower or knocking down sand castles is in fact a constructive effort to understand unity, we are able to revise our view of the situation, moving from reprimand and prohibition to the intelligent channeling of his efforts and the fostering of discovery.”
    —Polly Berrien Berends (20th century)

    “The dreariest spot in all the land
    To Death they set apart;
    With scanty grace from Nature’s hand,
    And none from that of Art.”
    —John Greenleaf Whittier (1807–1892)

    “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)