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  • Libro
    Digital
Symbolic Logic

Symbolic Logic

USD $ 5,75

In the Chapter on 'Propositions of Existence' I have adopted a new 'normal form,' in which the Class, whose existence is affirmed or denied, is regarded as the Predicate, instead of the Subject, of the Proposition, thus evading a very subtle difficulty which besets the other form. These subtle difficulties seem to lie at the root of every Tree of Knowledge, and they are far more hopeless to grapple with than any that occur in its higher branches. For example, the difficulties of the Forty-Seventh Proposition of Euclid are mere child's play compared with the mental torture endured in the effort to think out the essential nature of a straight Line. And, in the present work, the difficulties of the "5 Liars"" compared with the bewildering question "What is a Thing?" In the Chapter on 'Propositions of Relation' I have inserted a new Section, containing the proof that a Proposition, beginning with "All," is a Double Proposition (a fact that is quite independent of the arbitrary rule, laid down in the next Section, that such a Proposition is to be understood as implying the actual existence of its Subject).

Matemáticas
In the Chapter on 'Propositions of Existence' I have adopted a new 'normal form,' in which the Class, whose existence is affirmed or denied, is regarded as the Predicate, instead of the Subject, of the Proposition, thus evading a very subtle difficulty which besets the other form. These subtle difficulties seem to lie at the root of every Tree of Knowledge, and they are far more hopeless to grapple with than any that occur in its higher branches. For example, the difficulties of the Forty-Seventh Proposition of Euclid are mere child's play compared with the mental torture endured in the effort to think out the essential nature of a straight Line. And, in the present work, the difficulties of the "5 Liars"" compared with the bewildering question "What is a Thing?" In the Chapter on 'Propositions of Relation' I have inserted a new Section, containing the proof that a Proposition, beginning with "All," is a Double Proposition (a fact that is quite independent of the arbitrary rule, laid down in the next Section, that such a Proposition is to be understood as implying the actual existence of its Subject).
  • Isbn
    9786253877071
  • Peso
    7.3 MB
  • Número de páginas
    233
  • Idioma
    Inglés
  • Formato
    EPUB
  • Protección
    DRM
  • Referencia
    BKW193340

Lewis Carroll

Autor

Lewis Carroll (Charles Lutwidge Dogson; 1832-1898) Lógico, matemático, fotógrafo y novelista británico. Tras licenciarse en el Christ Church (1854), empezó a trabajar como docente y a colaborar en revistas cómicas y literarias, adoptando el seudónimo por el que sería universalmente conocido. Escribió dos de las más entrañables narraciones que se han producido en el campo de la literatura. Vivió 66 años tan tranquilamente como puede hacerlo cualquier otro hombre, y el trabajo y ocupación de su vida, así como su diversión favorita, fueron las matemáticas. Padeció de insomnios durante toda su existencia, y pasaba noches enteras despierto, con los arduos problemas matemáticos dando vueltas en su cabeza, y tratando de descifrarlos. Escribió también poesía, campo en el que destaca en su producción el poema narrativo "La caza del snark", plagado también de elementos fantásticos. Además de diversos textos matemáticos, fue autor de trabajos dedicados a la lógica simbólica, con el propósito explícito de popularizarla, en los cuales apunta su inclinación por explorar los límites y las contradicciones de los principios aceptados.