Fil:Petzval Strouhal Jarnik.jpg

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Beskrivelse

Beskrivelse
Català: D'esquerra a dreta: József Miksa Petzval (1807-1891), Vincenc Strouhal (1850-1922) i Vojtěch Jarník (1897-1970), científics txecoslovacs
English: From left to right: József Miksa Petzval (1807-1891), Vincenc Strouhal (1850-1922) i Vojtěch Jarník (1897-1970), Czechoslovakian scientists
Dato
Kilde Gymnázium Václava Hlavatého, Louny: https://www.glouny.cz/matematika/mat_sem/priklady/jarnik.htm
Opphavsperson Servei postal Txecoeslovac

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Public domain
According to the Czech Copyright Act, this work is in the public domain.

(Law No. 121/2000, Article 3, Section a)

“Protection pursuant to this Act shall not apply to

  • an official work, such as a legal regulation, decision, public charter, publicly accessible register and the collection of its records, and also
  • an official draft of an official work and other preparatory official documentation including the official translation of such work,
  • Chamber of Deputies and Senate publications,
  • a memorial chronicle of a municipality (muncipal chronicle),
  • a state symbol and symbol of a regional self-governing unit,
  • and other such works where there is public interest in their exclusion from copyright protection.”
Hence it is assumed that this work has been released into the public domain. However, in some instances the use of this work might be regulated by other laws.

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nåværende1. feb. 2021 kl. 14:07Miniatyrbilde av versjonen fra 1. feb. 2021 kl. 14:07790 × 349 (69 KB)Ferran MirUploaded a work by Servei postal Txecoeslovac from Gymnázium Václava Hlavatého, Louny: https://www.glouny.cz/matematika/mat_sem/priklady/jarnik.htm with UploadWizard

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