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From privative to equipollent: incipient changes in the aspectual system of heritage Russian
2016openaire +1 more source
The formalism ℒ⁺ without variables and the problem of its equipollence with ℒ
1987openaire +1 more source
The relative equipollence of ℒ and ℒ⁺, and the formalization of set theory in ℒ^{×}
1987openaire +1 more source

