| Nguyen's work is one manifestation of her longstanding love for rigorous and creative mathematical proofs. |
| For example, in proofs about sets, Venn diagrams provided a useful part of a concept image in some cases. |
| His publications include a biography of Leonhard Euler and a booklet on mathematical proofs. |
| Their intention has been to wait for the final proofs of their articles before correcting the intentional misstatements. |
| Mathematical proofs of conjectures, however, require more than overwhelming numerical evidence. |
| Euclid changed the proofs of several theorems in this book so that they fitted the new definition of proportion given by Eudoxus. |
