====== SARDF operations [Fayolle et al 2006] ======

===== Transformation: SARDF Union =====

**Call**: hfDUni(f1,f2);

**Parameters**:

f1,f2 - two objects

===== Transformation: SARDF Intersection =====

**Call**: hfDInt(f1,f2);

**Parameters**:

f1,f2 - two objects

===== Transformation: SARDF Subtraction =====

**Call**: hfDSub(f1,f2);

**Parameters**:

f1,f2 - two objects