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

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

    “If grandparents want to have a meaningful and constructive role, the first lesson they must learn is that becoming a grandparent is not having a second chance at parenthood!”
    —Eda Le Shan (20th century)

    “1st Witch. When shall we three meet again?
    In thunder, lightning, or in rain?
    2nd Witch. When the hurly-burly’s done,
    When the battle’s lost and won.
    3rd Witch. That will be ere set of sun.
    1st Witch. Where the place?
    2nd Witch. Upon the heath.
    3rd Witch. There to meet with Macbeth.”
    —William Shakespeare (1564–1616)

    “If my theory of relativity is proven correct, Germany will claim me as a German and France will declare that I am a citizen of the world. Should my theory prove untrue, France will say that I am a German and Germany will declare that I am a Jew.”
    —Albert Einstein (1879–1955)