| Algebraic Equation: x4-a2x2+a2y2 = 0 Degree: 4 Singularities: [0:0:1], [0:1:0] Multiplicity: 2, 2 Branching Number of each Singularity: 2, 2 Genus: 0 Parameterized Equation: x = -a(t2+1)/(1-t2), y = 2at(t2+1)/(1-t2)2 Delta Invariant: 3 Milnor Number: 1 Tjurina Number: 4 Projective Plane: 1 node, 1 cusp |
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