，正合微分方程- stiff differential equation
- stiff differential system
- stiffly stable system
- stiffness
- stiffness matrix
- stiffness method
- stiffness ratio
- stiff problem
- stiff-stability
- stiff system
- stigm
- stipulation
- Stirling approximation
- Stirling cycle number
- Stirling finite difference formula
- Stirling formula
- Stirling interpolation formula
- Stirling, J.
- Stirling number
- Stirling number of the first kind
- Stirling number of the second kind
- Stirling polynomial
- Stirling series
- Stirling transform
- stirrup curve