Equivalence Class Structure

Famous quotes containing the words class and/or structure:

“Women ... are completely alone, though they were born and bred upon this soil, as if they belonged to another class in creation.”
—“Jennie June” Croly 1829–1901, U.S. founder of the woman’s club movement, journalist, author, editor. F, Demorest’s Illustrated Monthly Mirror of Fashions, pp. 363-4 (December 1870)

“Each structure and institution here was so primitive that you could at once refer it to its source; but our buildings commonly suggest neither their origin nor their purpose.”
—Henry David Thoreau (1817–1862)