Topological classification of black holes: Generic maxwell set and crease set of a horizon

Mathematics

• Black Holes 100%
• Horizon 78%
• Fermat's Principle 24%
• Geometric Optics 20%
• Topology 20%
• Singularity Theory 19%
• Topological Structure 16%
• Qualitative Properties 16%
• Smooth function 13%
• Cauchy 13%
• Object 10%
• Context 9%

Physics & Astronomy

• horizon 73%
• topology 32%
• Fermat principle 28%
• event horizon 22%
• optics 13%

Earth & Environmental Sciences

• topology 74%