_:vIUjpiXg1712 . _:vIUjpiXg1712 "Russell-Whitehead". _:vIUjpiXg1709 . _:vIUjpiXg1709 "24133". _:vIUjpiXg1718 . _:vIUjpiXg1718 "Mathematica_Principia". _:vIUjpiXg1712. _:vIUjpiXg1714. _:vIUjpiXg1718. _:vIUjpiXg1711. _:vIUjpiXg1709. _:vIUjpiXg1716. _:vIUjpiXg1715. _:vIUjpiXg1717. _:vIUjpiXg1713. _:vIUjpiXg1710. "Principia-Mathematica"@en. "Principia Mathematica"@it. "Principia Mathematica"@es. "Principia mathematica"@pl. "Principia Mathematica"@de. "Principia Mathematica"@fr. "Principia Mathematica (Russell-Whitehead)"@ca. "Principia Mathematica"@en. . . . . . . . . . . . . . . "Source: Freebase - The World's database". "1910". . . . . . . . . . . _:vIUjpiXg1711 . _:vIUjpiXg1711 "Whitehead-Russell_axioms". _:vIUjpiXg1714 . _:vIUjpiXg1714 "Ramified_theory_of_types". _:vIUjpiXg1716 . _:vIUjpiXg1716 "principia_mathematica". _:vIUjpiXg1715 . _:vIUjpiXg1715 "Ramified_Theory_of_Types". _:vIUjpiXg1717 . _:vIUjpiXg1717 "Principia_mathematica". _:vIUjpiXg1713 . _:vIUjpiXg1713 "Ramified_type_theory". _:vIUjpiXg1710 . _:vIUjpiXg1710 "Principia_Mathematica".