| Improvements in Polynomial-Time Feasibility Testing for EDF Recent countries visiting this post |  |
 | 4 | United States |
 | 1 | Canada |
 | 1 | Russian Federation |
| Improvements in Polynomial-Time Feasibility Testing for EDF Recent countries visiting this post | |
| 4 | United States |
| 1 | Canada |
| 1 | Russian Federation |