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Mathematica, p 165)When letters , , f, g, occur without the shriek they are schematic for wffs They cannot be bound because they are not objectlanguage predicate variables The historical Principia Mathematica allows no nonpredicative variables in its grammar Thus, ramification is not coded into its syntaxJan 18,  · BERTRAND RUSSELL & ALFRED NORTH WHITEHEAD – Principia Mathematica 11=2 Bertrand Russell () and AN Whitehead () Bertrand Russell and Alfred North Whitehead were British mathematicians, logicians and philosophers, who were in the vanguard of the British revolt against Continental idealism in the early th Century and, betweenJun 17, 06 · The last page of Russel and Whitehead's proof that 11=2 On page 378 (yes, three hundred and seventy eight!) of the Principia Mathematica Yes, it's there The whole thing the entire Principia 1931 Theoretical Computer Science Ai Theory Founded By Goedel 1+1=2 proof principia mathematica pdf