| dinvchisq | The Inverse (non-central) Chi-Squared Distribution | 
| dinvexp | The Inverse Exponential Distribution | 
| dinvgamma | The Inverse Gamma Distribution | 
| invchisq | The Inverse (non-central) Chi-Squared Distribution | 
| invexp | The Inverse Exponential Distribution | 
| invgamma | The Inverse Gamma Distribution | 
| pinvchisq | The Inverse (non-central) Chi-Squared Distribution | 
| pinvexp | The Inverse Exponential Distribution | 
| pinvgamma | The Inverse Gamma Distribution | 
| qinvchisq | The Inverse (non-central) Chi-Squared Distribution | 
| qinvexp | The Inverse Exponential Distribution | 
| qinvgamma | The Inverse Gamma Distribution | 
| rinvchisq | The Inverse (non-central) Chi-Squared Distribution | 
| rinvexp | The Inverse Exponential Distribution | 
| rinvgamma | The Inverse Gamma Distribution |