Kleinova ploskev
Kleinova steklenica, Kleinova ploskev
a closed surface with only one side; formed by passing one end of a tube through the side of the tube and joining it with the other end [zaprtina s samo eno stranjo, oblikovana tako, da se en konec cevi prepogne skozi stran cevi in se poveže z drugim koncem]
Dostopnost
Dostopnost