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|Berka I 469|
Generalization/generalization/Tarski: lets free variables disappear.
Berka I 480
Generalization/generalization/fulfillment/"at most distinguished at i-th position"/Tarski: Let x be a propositional function, assuming it is already known, which sequences satisfy the function x - by taking into account the content of the subject operation, we will only claim of the sequence f, that it satisfies the function LKx if this sequence itself satisfies the function x, and even then not stops to satisfy this sequence when the k-th term varies in any way - e.g. the function L2l1,2 is only satisfied through such a result, if the formula f1
Logic, Semantics, Metamathematics: Papers from 1923-38 Indianapolis 1983
K. Berka/L. Kreiser
Logik Texte Berlin 1983