Top Countries in Discrete Mathematics and Combinatorics Research
United States ranks first in 2022-now, followed by China and United Kingdom, out of 10 ranked countries.
Quality score: the square root of excellence (the share of works in the world top 10% against what the place's own topics predict, on English-language articles and reviews) times the square root of the journal factor (its papers in the Nature Index's selective journals against what its topics predict), times output to the power 0.3 times breadth (how much of the selected area it works in) to the power 0.25. Floor: 100 fractional works in this field.
Ranked by research quality, 2022-now
| # | Country | Score | Top-10% rate | Works | Citations | All time |
|---|---|---|---|---|---|---|
| 1 |  United States |
100.0 | 11.0% | 1.4k | 3.3k | #1 |
| 2 |  China |
69.9 | 11.9% | 1.5k | 2.9k | #4 |
| 3 |  United Kingdom |
52.3 | 12.0% | 387 | 813 | #2 |
| 4 |  Germany |
39.8 | 11.8% | 391 | 787 | #3 |
| 5 |  France |
30.1 | 9.4% | 363 | 746 | #5 |
| 6 |  Canada |
22.2 | 11.8% | 252 | 693 | #8 |
| 7 |  Italy |
15.5 | 12.5% | 253 | 494 | #12 |
| 8 |  Japan |
9.7 | 6.0% | 290 | 398 | #15 |
| 9 |  Russia |
4.6 | 6.2% | 462 | 581 | #9 |
| 10 |  India |
0.0 | 8.7% | 503 | 682 | #18 |
countries ranked worldwide in Discrete Mathematics and Combinatorics (10). rank on the quality score within the stated pool. The score track runs 0 to 100; the rate track carries no average mark, because the average differs by field (about 6% in Dentistry, 21% in Economics).
How spread out this pool is
Every row above on one axis, one tick each. Right is a higher score. A field where the top few are far clear of everyone and one that runs down evenly look identical as a table.
Ranked by volume, 2022-now
- 1
China
1.8k works
- 2
United States
1.6k works
- 3
India
610 works
- 4
Russia
505 works
- 5
United Kingdom
443 works
- 6
Germany
441 works
- 7
France
408 works
- 8
Japan
331 works
- 9
Italy
289 works
- 10
Canada
284 works
- 11
South Korea
173 works
- 12
Brazil
162 works