Fraenkel Set Theory

Famous quotes containing the words set and/or theory:

“They set up a noise like crickets,
A chattering wise and sweet,
And her hair was a folded flower
And the quiet of love in her feet.”
—William Butler Yeats (1865–1939)

“No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.”
—André Gide (1869–1951)