Question about the defination of the first order Language
63687
In Mathematical Logic, What is a Language?
4383
Finitely generated monoids - how to show that there is not first order set axiomatizing them.
13294
Can "firstly" be used in the same meaning as "at first/initially"?
96504
First-Order Logic vs. Second-Order Logic
37601
Catenatives followed by infinitives and gerunds
24947
The main verb of the second clause
125950
Proof strategy involving first order logic for existential quantification at very beginning
31979
Notation: Why write the differential first?
104034
Is $\le$ defined by $\langle 𝑥_1, 𝑦_1 \rangle \le \langle 𝑥_2, 𝑦_2 \rangle$, if $𝑥_1 \le 𝑥_2 \land𝑦_1 \ge 𝑦_2$ a linear order?
19604
Complete first order theory with finite model is categorical
53199
First-Order Logic: Formalisation of the phrase "Not all that glitters is gold"
123598
Showing the set of DFAs that accept nonempty languages is decidable
18968
Converting English into first order predicate logic
137244
Understanding - Order of Execution
140682
Proving a property of a Logic Formal Language
101163
Does there exist a universal formula of first-order logic that is satisfiable only by structures with infinite domains?
64454
$L^2([0,1])$ is a set of first category in $L^1([0,1])$?