Vol. 49 No. 4 (2020)

View Vol. 49 No. 4 (2020)
Published: 2020-12-30

Full Issue

  • The Phenomenology of Second-Level Inference: Perfumes in The Deductive Garden

    David Makinson (Author)
    327-342
    DOI: https://doi.org/10.18778/0138-0680.2020.23

  • From Intuitionism to Brouwer's Modal Logic

    Zofia Kostrzycka (Author)
    343-358
    DOI: https://doi.org/10.18778/0138-0680.2020.22

  • Empirical Negation, Co-Negation and the Contraposition Rule II: Proof-Theoretical Investigations

    Satoru Niki (Author)
    359-375
    DOI: https://doi.org/10.18778/0138-0680.2020.13

  • Length Neutrosophic Subalgebras of BCK=BCI-Algebras

    Young Bae Jun, Madad Khan, Florentin Smarandache, Seok-Zun Song (Author)
    377-400
    DOI: https://doi.org/10.18778/0138-0680.2020.21

  • Four-valued expansions of Dunn-Belnap's logic (I): Basic characterizations

    Alexej P. Pynko (Author)
    401-437
    DOI: https://doi.org/10.18778/0138-0680.2020.19