We study a quantum-mechanical system of three particles in a one-dimensional box with two-particle harmonic interactions. The symmetry of the system is described by the point group D3d. Group theory greatly facilitates the ...

An algebra A = ⟨A, ∨, ∧, →, 0, 1⟩ is a semi-Heyting algebra if ⟨A, ∨, ∧, 0, 1⟩ is a bounded lattice, and it satisfies the identities: x ∧ (x → y) ≈ x ∧ y, x ∧ (y → z) ≈ x ∧ [(x ∧ y) → (x ∧ z)], and x → x ≈ 1. ℋ denotes the ...

Polish community in Argentina –along with the community in Brazil– is one of the most numerous Polishorigin communities in Latin America. Seventy years have passed since the migratory processes between Poland and Argentina ...

An algebra A=⟨A,→,0⟩, where → is binary and 0 is a constant, is called an implication zroupoid (I-zroupoid, for short) if A satisfies the identities: (x→y)→z≈[(z′→x)→(y→z)′]′ and 0′′≈0, where x′:=x→0, and I denotes the ...

Bacillus pumilus group strains have been studied due their agronomic, biotechnological or pharmaceutical potential. Classifying strains of this taxonomic group at species level is a challenging procedure since it is composed ...

Microbial communities are a key for terrestrial ecosystem functioning. However, their responses to changes in plant species identity and richness, and stages of developmental morphology have been rarely investigated. The ...

Class identity is a key mechanism in the explanation of class-based collective action. For decades, this was particularly relevant in Latin America, where objective class inequality was persistent and there was a long ...

We study the free metabelian group M(2,n) of prime power exponent n on two generators by means of invariants M(2,n)′→Zn that we construct from colorings of the squares in the integer grid R×Z∪Z×R . In particular, we improve ...