Disambiguation evidence for Hirzebruch surfaces via surface form

"F_0 is isomorphic to P^1 × P^1"

Triples (1)

Triples where some other subject referred to this entity as "F_0 is isomorphic to P^1 × P^1".

Hirzebruch surfaces → specialCase →
"F_0 is isomorphic to P^1 × P^1"
↳ resolves to Hirzebruch surfaces
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