Earlier algebraic semantics for Belnapian modal logics were defined in terms of twist-structures over modal algebras. In this paper we introduce the class of BK -lattices, show that this class coincides with the abstract closure of the class of twist-structures, and it forms a variety. We prove that the lattice of subvarieties of the variety of BK -lattices is dually isomorphic to the lattice of extensions of Belnapian modal logic BK . Finally, we describe invariants determining a twist-structure over a (...) modal algebra. (shrink)

Издание содержит: хрестоматия; философы; психологи; литературоведы, искусствоведы; мастер изобразительного искусства и др.

Ėstetika antichnosti -- Ėstetika srednikh vekov -- Ėstetika vozrozhdenii︠a︡ -- Ėstetika frant︠s︡uzskogo prosveshchenii︠a︡ -- Ėstetika nemet︠s︡kogo prosveshchenii︠a︡ -- Ėstetika angliĭskogo prosveshchenii︠a︡ -- Ėstetika "Buri i natiska" -- Nemet︠s︡kai︠a︡ klassicheskai︠a︡ ėstetika.

Scale invariance is considered in the context of gravitational theories where the action, in the first order formalism, is of the form S=∫ L 1 Φ d 4 x+∫ L 2 $\sqrt{-g}$ d 4 x where the volume element Φ d 4 x is independent of the metric. For global scale invariance, a “dilaton” φ has to be introduced, with non-trivial potentials V(φ)=f 1 eαφ in L 1 and U(φ)=f 2 e 2αφ in L 2 . This leads to non-trivial (...) mass generation and a potential for φ which is interesting for inflation. Interpolating models for natural transition from inflation to a slowly accelerated universe at late times appear naturally. This is also achieved for “Quintessential models,” which are scale invariant but formulated with the use of volume element Φ d 4 x alone. For closed strings and branes (including the supersymmetric cases), the modified measure formulation is possible and does not require the introduction of a particular scale (the string or brane tension) from the begining but rather these appear as integration constants. (shrink)

Classical Invariantism (CI): The truth-value of a given knowledge-ascribing (-denying) sentence is (a) invariant across conversational contexts and (b) independent of how important it is to the subject (S) that the relevant proposition (P) be true.

Introduction Anandabodha is a great name in the history of Advaita Vedanta. This is evident from Dr. Das Gupta's reference to him as "the only author of ...

This is a new release of the original 1932 edition.

v. 1. 1929-1936 -- v. 2. 1936-1946 -- v. 3. 1948-1955 -- v. 4. 1923-1952.