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The number of conics tangent to five given conics: the real case

1997; Springer Science+Business Media; Volume: 10; Issue: 2 Linguagem: Inglês

10.5209/rev_rema.1997.v10.n2.17451

ISSN

1988-2807

Autores

Felice Ronga, Alberto Tognoli, Thierry Vust,

Tópico(s)

Advanced Combinatorial Mathematics

Resumo

It ja clasaical result, fiat established by de Jonqui’eres (1859), tbat generically the number of conica tangent to 5 given conica in the complex projective plane is 3264. We show here the existence of configurationa of 5 real canica such that the number of real canica tangent to them ja 3264.

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