Object to store second derivatives of \( f(n_n,n_p,T) \). 
Public Members
- 
fp_t dsdT
 
- The quantity \( (\partial^2 P)/(\partial T^2) \).  
- 
fp_t dmundT
 
- The quantity \( (\partial^2 P)/(\partial T \partial n_n) \).  
- 
fp_t dmupdT
 
- The quantity \( (\partial^2 P)/(\partial T \partial n_p) \).  
- 
fp_t dmundnn
 
- The quantity \( (\partial^2 P)/(\partial n_n^2) \).  
- 
fp_t dmudn_mixed
 
- The quantity \( (\partial^2 P)/(\partial n_n \partial n_p) \).  
- 
fp_t dmupdnp
 
- The quantity \( (\partial^2 P)/(\partial n_p^2) \).