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Update to “A Survey of Abstract Algebraic Logic”

✍ Scribed by J. M. Font; R. Jansana; D. Pigozzi


Publisher
Springer Netherlands
Year
2009
Tongue
English
Weight
155 KB
Volume
91
Category
Article
ISSN
0039-3215

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## Abstract In this note, it is shown that, given a __π__ ‐institution ℐ = 〈**Sign**, SEN, __C__ 〉, with __N__ a category of natural transformations on SEN, every theory family __T__ of ℐ includes a unique largest theory system $ \overleftarrow T $ of ℐ. $ \overleftarrow T $ satisfies the important