11Pxx | 11N | 11 | 11R |
| 11P05 | Waring's problem and variants |
| 11P21 | Lattice points in specified regions |
| 11P32 | Goldbach-type theorems; other additive questions involving primes |
| 11P55 | Applications of the Hardy-Littlewood method [See also 11D85] |
| 11P70 | Inverse problems of additive number theory |
| 11P81 | Elementary theory of partitions [See also 05A17] |
| 11P82 | Analytic theory of partitions |
| 11P83 | Partitions; congruences and congruential restrictions |
| 11P99 | None of the above, but in this section |