detectCongruence -- detect and return a congruence of secant curves to a surface

Ways to use detectCongruence :

• "detectCongruence(HodgeSpecialFourfold)"
• "detectCongruence(HodgeSpecialFourfold,ZZ)"
• "detectCongruence(SpecialCubicFourfold)" -- see detectCongruence(SpecialCubicFourfold,ZZ) -- detect and return a congruence of (3e-1)-secant curves of degree e
• detectCongruence(SpecialCubicFourfold,ZZ) -- detect and return a congruence of (3e-1)-secant curves of degree e
• "detectCongruence(SpecialGushelMukaiFourfold)" -- see detectCongruence(SpecialGushelMukaiFourfold,ZZ) -- detect and return a congruence of (2e-1)-secant curves of degree e inside a del Pezzo fivefold
• detectCongruence(SpecialGushelMukaiFourfold,ZZ) -- detect and return a congruence of (2e-1)-secant curves of degree e inside a del Pezzo fivefold

For the programmer

The object detectCongruence is a method function with options.