On the number of independent orders
نویسندگان
چکیده
We investigate the model-theoretic invariant ? s r d m ( T ) , which was introduced by Shelah, and prove that is sub-additive. An infinite value of leads to equality = 1 . apply same proof method analyze other i show it also sub-additive, achieving an improvement Shelah's result.
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ژورنال
عنوان ژورنال: Annals of Pure and Applied Logic
سال: 2021
ISSN: ['0168-0072', '1873-2461']
DOI: https://doi.org/10.1016/j.apal.2020.102886