+Model theory explores the deep connection between formal languages and their mathematical [Structures](/wiki/structure). It studies how logical formulas, often from [First-order logic](/wiki/first_order_logic), define and describe these mathematical worlds, revealing what can be expressed and understood within them.
+## See also
+- [Logic](/wiki/logic)
+- [Set Theory](/wiki/set_theory)
+- [Universal Algebra](/wiki/universal_algebra)
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