counter example for zorn lemma.
29668
Why doesn't Zorn's lemma apply to $[0,1)$?
85799
Finding languages such that $L_{1} \subseteq L_{2} \subseteq L_{3}$ where $L_{1}, L_{3} \notin \mathbb{R}$, $L_{2} \in \mathbb{R}$
77297
Counterexample for $A,B\triangleleft G,G/A\cong B \Rightarrow G/B\cong A$
129227
An example of neither open nor closed set
80684
Counter example for $(A \times B) \cap (C \times D) = (A \cap C ) \times (B \cap D)$
144572
Proof that ideals in $C[0,1]$ are of the form $M_c$ that should not involve Zorn's Lemma
86622
I want to find an example where the Spectrum is equal to the Continuous Spectrum in C[0,1]; $\sigma_c(A)=\sigma(A)$
47159
Wanted: example of an increasing sequence of $\sigma$-fields whose union is not a $\sigma$-field
42774
Examples of involutions on $\mathbb{R}$
123132
Counterexample for a non-measurable function?
94397
Example of a non-splitting exact sequence $0 → M → M\oplus N → N → 0$
72506
An example s.t. $E(E(X|\mathcal F_1)|\mathcal F_2)\neq E(E(X|\mathcal F_2)|\mathcal F_1)$
3663
Finding counterexamples in elementary set theory.
113925
Normal Subgroup Counterexample
20658
Difficulty in finding a counterexample
143000
Show that there exists a $c\in \mathbb{C}$ such that $f(z)=c \bar{z}$ for all $\vert z\vert=1$.
154759
Kuratowski-Zorn Lemma with pre-order (quasi-order, proset) instead poset?