| Our greatest debt to Lefschetz lies in the fact that he showed us that a study of topology was essential for all algebraic geometers. |
| That is, the pre-Euclidean, Classical Greek geometers, typified by the Pythagoreans, and the School of Plato. |
| Ancient Greek geometers knew that the number of solids that can be constructed from regular geometric figures is limited to five. |
| Halley suggested to him that he might devote his considerable talents to the restoration of the work of the early Greek geometers, such as Euclid and Apollonius of Perga. |
| Pappus of Alexandria is the last of the great Greek geometers and one of his theorems is cited as the basis of modern projective geometry. |
| Ever since Plato, philosophers have envied geometers their certitudes. |
