（又称“一致代数”)- singular automorphism
- singular bilinear form
- singular bordism
- singular boundary
- singular boundary point
- singular branch process
- singular calculus
- singular cardinal
- singular cardinal number
- singular cardinal problem
- singular case
- singular cell
- singular chain
- singular chain complex
- singular chain group
- singular circle
- singular cochain
- singular cochain complex
- singular cocycle
- singular coefficient
- singular cohomology
- singular cohomology group
- singular cohomology ring
- singular collineation
- singular complex