Question

Leibniz formula for determinants and the sign function

score 364 · Answer 1 · 2020-02-17 15:10:26

364

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Leibniz formula for determinants and the sign function

Published on 17 Feb 2020 - 15:10

score 118 · Answer 2 · 2020-04-14 14:47:44

118

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Determining the parity (even or odd) of pi notation

Published on 14 Apr 2020 - 14:47

score 42 · Answer 3 · 2020-04-15 05:34:20

42

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What is $\sum\limits_{i=1}^{2012} b_{4i}$?

Published on 15 Apr 2020 - 5:34

score 99 · Answer 4 · 2026-03-25 15:55:47

99

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Is there a way to test parity of fractional part (only period) of irredecible rational number without calculation?

Published on 25 Mar 2026 - 15:55

score 1.4k · Answer 5 · 2020-05-06 20:16:13

1.4k

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let $a, b \in \mathbb{Z}$. Prove that if $a-b$ is odd, then $a$ and $b$ have opposite parity.

Published on 06 May 2020 - 20:16

score 189 · Answer 6 · 2026-03-25 12:55:03

189

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What is a generator for an ideal such that $I=\{a+bi|a+b \text{ is even}\}$?

Published on 25 Mar 2026 - 12:55

score 232 · Answer 7 · 2026-03-25 20:36:36

232

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Determining the parity of the coefficients of a quadratic given that there is a rational solution

Published on 25 Mar 2026 - 20:36

score 135 · Answer 8 · 2020-06-28 10:27:23

135

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Floor function parity problem

Published on 28 Jun 2020 - 10:27

score 118 · Answer 9 · 2020-07-10 03:13:34

118

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If $\frac{p^2}{q^2} + \frac{r^2}{s^2} = 1$, then $q,s$ are odd and one of $p,r$ is even

Published on 10 Jul 2020 - 3:13

score 74 · Answer 10 · 2016-07-21 11:11:07

74

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Is $2\prod_{i=1}^{n}{p_i} - \prod_{i=1}^{n}{(p_i + 1)} - \prod_{i=1}^{n}{(p_i - 1)}$ even and negative for $n > 1$?

Published on 21 Jul 2016 - 11:11

score 1k · Answer 11 · 2016-08-15 10:17:37

1k

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parity check matrix and linearly independent

Published on 15 Aug 2016 - 10:17

score 1.1k · Answer 12 · 2016-08-15 11:19:59

1.1k

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Are half of all numbers even?

Published on 15 Aug 2016 - 11:19

score 2.3k · Answer 13 · 2016-08-26 16:11:25

2.3k

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$f(x) = \lfloor x \rfloor - \left\{ x \right\}:$ Increasing, Decreasing, Even , Odd, And/Or Invertible?

Published on 26 Aug 2016 - 16:11

score 1.3k · Answer 14 · 2016-08-28 02:03:47

1.3k

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A closed path is made up of 11 line segments. Can one line, not containing a vertex of the path, intersect each of its segments?

Published on 28 Aug 2016 - 2:03

score 253 · Answer 15 · 2016-09-19 16:26:08

253

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Question about the sum of four squares

Published on 19 Sep 2016 - 16:26

List Question

Leibniz formula for determinants and the sign function

Determining the parity (even or odd) of pi notation

What is $\sum\limits_{i=1}^{2012} b_{4i}$?

Is there a way to test parity of fractional part (only period) of irredecible rational number without calculation?

let $a, b \in \mathbb{Z}$. Prove that if $a-b$ is odd, then $a$ and $b$ have opposite parity.

What is a generator for an ideal such that $I=\{a+bi|a+b \text{ is even}\}$?

Determining the parity of the coefficients of a quadratic given that there is a rational solution

Floor function parity problem

If $\frac{p^2}{q^2} + \frac{r^2}{s^2} = 1$, then $q,s$ are odd and one of $p,r$ is even

Is $2\prod_{i=1}^{n}{p_i} - \prod_{i=1}^{n}{(p_i + 1)} - \prod_{i=1}^{n}{(p_i - 1)}$ even and negative for $n > 1$?

parity check matrix and linearly independent

Are half of all numbers even?

$f(x) = \lfloor x \rfloor - \left\{ x \right\}:$ Increasing, Decreasing, Even , Odd, And/Or Invertible?

A closed path is made up of 11 line segments. Can one line, not containing a vertex of the path, intersect each of its segments?

Question about the sum of four squares

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