| Convolution surfaces for arcs and quadratic curves with a varying kernel Recent countries visiting this post |  |
 | 3 | United States |
 | 1 | Ukraine |
 | 1 | Russian Federation |
| Convolution surfaces for arcs and quadratic curves with a varying kernel Recent countries visiting this post | |
| 3 | United States |
| 1 | Ukraine |
| 1 | Russian Federation |