03Hxx
03G | 
03 | 
05 03Hxx | 03G | 03 | 05 |
| 03H05 | Nonstandard models in mathematics [See also 26E35, 28E05, 30G06, 46S20, 47S20, 54J05] |
| 03H10 | Other applications of nonstandard models (economics, physics, etc.) |
| 03H15 | Nonstandard models of arithmetic [See also 11U10, 12L15, 13L05] |
| 03H99 | None of the above, but in this section |