- Dimension | 0, 4, 2
- Real coordinate space | 0, 89, 21
- Topology | 72, 2k, 54
- Calculus | 17, 8k, 203
- Mathematics | 17, 28k, 633
- Ciro Santilli's Homepage | 262, 218k, 4k
- Continuous spectrum | 103
- Linear map | 201, 1k, 21
- Time-independent Schrodinger equation | 416