Kata Kunci Pencarian:

• De Bruijn–Erdős theorem (incidence geometry)
• De Bruijn–Erdős theorem
• Incidence geometry
• List of theorems
• List of things named after Paul Erdős
• De Bruijn
• Linear space (geometry)
• Sylvester–Gallai theorem
• Nicolaas Govert de Bruijn
• Zarankiewicz problem