Question

Meaning of $e_{1}$ in $|(s-e_{1})´v|=||s-e_{1}||\cdot ||v||$

score 20 · Answer 1 · 2026-04-16 09:33:42

20

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Meaning of $e_{1}$ in $|(s-e_{1})´v|=||s-e_{1}||\cdot ||v||$

Published on 16 Apr 2026 - 9:33

score 49 · Answer 2 · 2026-04-13 18:56:44

49

Views

Standard notation for permutations

Published on 13 Apr 2026 - 18:56

score 49 · Answer 3 · 2026-04-15 10:42:42

49

Views

What is the conventional name/notation for the function $ N(n) = \begin{cases} 1 & n \le 0 \\ n & n > 0 \end{cases}$?

Published on 15 Apr 2026 - 10:42

score 72 · Answer 4 · 2026-04-11 10:30:02

72

Views

What is the technical difference between $\longleftrightarrow$ and $\iff$?

Published on 11 Apr 2026 - 10:30

score 63 · Answer 5 · 2026-04-12 20:21:13

63

Views

Referencing a statement with quantifiers in two separate lines

Published on 12 Apr 2026 - 20:21

score 41 · Answer 6 · 2026-04-15 10:22:08

41

Views

Convoluted notation involving a double sum and a product $\sum_{m\geq0}\sum_{1\leq...<|x|;1\leq...<|y|}$ where $x$ and $y$ are sequences

Published on 15 Apr 2026 - 10:22

score 27 · Answer 7 · 2026-04-14 13:47:32

27

Views

Is there a specific terminology for these upper unitriangular matrices?

Published on 14 Apr 2026 - 13:47

score 55 · Answer 8 · 2026-04-11 20:21:51

55

Views

What does a subscript + means?

Published on 11 Apr 2026 - 20:21

score 48 · Answer 9 · 2026-04-14 11:18:46

48

Views

What kind of notation is $\pi: b\ \varnothing\ M$?

Published on 14 Apr 2026 - 11:18

score 53 · Answer 10 · 2026-04-11 09:03:48

53

Views

Notation clarification on Allen hatcher section 3.1

Published on 11 Apr 2026 - 9:03

score 94 · Answer 11 · 2026-04-14 19:15:11

94

Views

But what is with the other cyclic groups? Doesn't one also have to consider them?

Published on 14 Apr 2026 - 19:15

score 93 · Answer 12 · 2026-04-14 21:20:03

93

Views

Where f is a function, does $f ab = f(a)b~ \text{or}~ f(ab)$?

Published on 14 Apr 2026 - 21:20

score 87 · Answer 13 · 2026-04-13 22:56:55

87

Views

Notation for the number of times one element divides another.

Published on 13 Apr 2026 - 22:56

score 269 · Answer 14 · 2026-04-14 07:45:17

269

Views

Row-wise non zero product in matrix notation

Published on 14 Apr 2026 - 7:45

score 85 · Answer 15 · 2026-04-13 14:22:20

85

Views

A basic notational doubt

Published on 13 Apr 2026 - 14:22

List Question

Meaning of $e_{1}$ in $|(s-e_{1})´v|=||s-e_{1}||\cdot ||v||$

Standard notation for permutations

What is the conventional name/notation for the function $ N(n) = \begin{cases} 1 & n \le 0 \\ n & n > 0 \end{cases}$?

What is the technical difference between $\longleftrightarrow$ and $\iff$?

Referencing a statement with quantifiers in two separate lines

Convoluted notation involving a double sum and a product $\sum_{m\geq0}\sum_{1\leq...<|x|;1\leq...<|y|}$ where $x$ and $y$ are sequences

Is there a specific terminology for these upper unitriangular matrices?

What does a subscript + means?

What kind of notation is $\pi: b\ \varnothing\ M$?

Notation clarification on Allen hatcher section 3.1

But what is with the other cyclic groups? Doesn't one also have to consider them?

Where f is a function, does $f ab = f(a)b~ \text{or}~ f(ab)$?

Notation for the number of times one element divides another.

Row-wise non zero product in matrix notation

A basic notational doubt

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