Why is better to work with first-order logic than with second-order logic?
9968
First-order logic advantage over second-order logic
42590
Understanding implication in logic truth tables (excerpt from textbook)
156121
Existential-universal vs Universal-existential quantifiers
25779
Constants of motion vs. integrals of motion vs. first integrals
66636
Problems with introducing ordered pairs axiomatically
112742
\let\foo\bar vs \let\foo=\bar (let with equals sign)
28281
Different standards for writing down logical quantifiers in a formal way
4923
Why don't we study algebraic objects with more than two operations?
101163
Does there exist a universal formula of first-order logic that is satisfiable only by structures with infinite domains?
150451
Logic soundness and completeness
12091
Are if else statement equivalent to logical and && or || and where should I prefer one over the other?
108155
How can we justify the use of logic?
98422
why do we use 'non-increasing' instead of decreasing?
77736
Quantifier Order Matters?
105815
Does proving (second countable) $\Rightarrow$ (Lindelöf) require the axiom of choice?
134313
Why is the well ordering principle counter-intuitive?
31979
Notation: Why write the differential first?