query: I got the following quiz question wrong: Does {} ∈ (1,2)?
positive_passages.docid: 123498
positive_passages.text: Is "empty set" an element of a set?
negative_passages.docid: 106562
negative_passages.text: Is $3 \ge 1$ or is it just $3 > 1$?
negative_passages.docid: 127745
negative_passages.text: Why does 2 == [2] in JavaScript?
negative_passages.docid: 109219
negative_passages.text: How do the sets $\emptyset\times B,\ A\ \times \emptyset, \ \emptyset \times \emptyset $ look like?
negative_passages.docid: 155136
negative_passages.text: $x\in \{\{\{x\}\}\}$ or not?
negative_passages.docid: 3072
negative_passages.text: If the empty set is a subset of every set, why isn't $\{\emptyset,\{a\}\}=\{\{a\}\}$?
negative_passages.docid: 66563
negative_passages.text: Is $ (A∪B)×(C∩D)=(A∪C)×(B∪D)$ true for all sets A,B,C and D?
negative_passages.docid: 155414
negative_passages.text: subequations and array in braces
negative_passages.docid: 5639
negative_passages.text: No \xrightrightarrow[a]{b}?
negative_passages.docid: 63017
negative_passages.text: How does a for loop work, specifically for(;;)?
negative_passages.docid: 39485
negative_passages.text: Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b')
negative_passages.docid: 141886
negative_passages.text: Incorrect notation in math?
negative_passages.docid: 33543
negative_passages.text: is "y1 < x < y2" an inequality or inequalities?
negative_passages.docid: 141961
negative_passages.text: What is the difference between [[ $a == z* ]] and [ $a == z* ]?
negative_passages.docid: 35484
negative_passages.text: A question in math mode
negative_passages.docid: 67637
negative_passages.text: How come $\lambda(\mathbb{Q})= \inf\left\{\sum_{n \ge 1} \lambda([a_n,b_n)) : \mathbb{Q} \subset \bigcup_{n \ge 1} [a_n,b_n)\right\} = 0$?
negative_passages.docid: 36537
negative_passages.text: do { ... } while (0) — what is it good for?