Positively Curved Manifolds

Famous quotes containing the words positively and/or curved:

“I positively like the sense, when I dine out, and stoop to rescue a falling handkerchief, that I am not going to rub my shoulder against a heart. What are hearts doing on sleeves?”
—Katharine Fullerton Gerould (1879–1944)

“By constant dripping, water hollows stone,
A signet-ring from use alone grows thin,
And the curved plowshare by soft earth is worn.”
—Ovid (Publius Ovidius Naso)