---
res:
  bibo_abstract:
  - In the class of projective billiards, which contains the usual billiards, we exhibit
    counter-examples to Ivrii's conjecture, which states that in any planar billiard
    with smooth boundary the set of periodic orbits has zero measure. The counter-examples
    are polygons admitting a 2-parameters family of n-periodic orbits, with n being
    either 3 or any even integer greater than 4.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Corentin
      foaf_name: Fiorebe, Corentin
      foaf_surname: Fiorebe
      foaf_workInfoHomepage: http://www.librecat.org/personId=06619f18-9070-11eb-847d-d1ee780bd88b
  bibo_doi: 10.3934/dcds.2024059
  bibo_issue: '11'
  bibo_volume: 44
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001230091000001
  dct_isPartOf:
  - http://id.crossref.org/issn/1078-0947
  - http://id.crossref.org/issn/1553-5231
  dct_language: eng
  dct_publisher: American Institute of Mathematical Sciences@
  dct_title: Examples of projective billiards with open sets of periodic orbits@
...