User Kaish - Mathematics Stack Exchange

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	1,675 reputation	bio	website		visits	member for	9 months
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1

10

votes

11

answers

993

views

How do we know all numbers alternate between odd and even numbers?

elementary-number-theory proof-writing

apr 28 at 20:35 Kaish 1,675

2

6

votes

5

answers

261

views

Is there a quick way to solve $3^8 \equiv x \mod 17$?

elementary-number-theory

jan 11 at 0:10 N. S. 27.8k

5

votes

3

answers

81

views

How is $x^2 + x + 1$ reducible in $\mathbb{Z}_3[x]$?

number-theory

apr 10 at 10:37 Kaish 1,675

1

5

votes

3

answers

242

views

Show that every group $G$ of order $175$ is abelian and list all isomorphism types of these groups

abstract-algebra group-theory

jan 10 at 0:42 amWhy 54.7k

5

votes

7

answers

272

views

Intuitive definitions of the Orbit and the Stabilizer

abstract-algebra group-theory

dec 8 at 0:56 amWhy 54.7k

4

votes

3

answers

81

views

Questions on the proof of “If you switch two rows on a matrix, then $\det(B) = - \det(A)$”

linear-algebra proof-writing

apr 25 at 0:21 Peter Tamaroff 25.8k

4

votes

1

answer

52

views

Calculating the sign of the generalised permutation

permutations permutation-groups

apr 20 at 16:35 boohoo 1

4

votes

2

answers

51

views

How to factorise a polynomial in the ring $\mathbb{Z}_p[x]$

homework number-theory

apr 14 at 18:33 Hurkyl 21.5k

1

4

votes

1

answer

49

views

For $1 \leq q < p \leq 8$, identify which $p^2 + q^2$ is not prime (Pythagorean Triples)

homework number-theory

apr 13 at 22:12 Berci 20.7k

4

votes

4

answers

170

views

How to solve $a\cos^2(\theta) + b \sin^2(\theta) = 0$ for $\theta$

homework algebra-precalculus

mar 20 at 15:17 Henry T. Horton 7,524

4

votes

1

answer

59

views

Write down the equation of the tangent plane and compute the Taylor series of the function

homework differential-topology taylor-expansion

mar 6 at 16:29 Glougloubarbaki 2,297

4

votes

1

answer

29

views

Determinant of the matrix $D_n(2,3,1)$

homework geometry determinant

feb 11 at 22:01 Berci 20.7k

4

votes

2

answers

124

views

Where have I made my mistake in calculating $P^{-1}AP$?

linear-algebra matrices

jan 9 at 0:54 Jack 7,501

1

4

votes

4

answers

146

views

Proving the stabilizer is a subgroup of the group to prove the Orbit-Stabiliser theorem

abstract-algebra group-theory proof-strategy

dec 27 at 15:54 Babak S. 27.8k

4

votes

3

answers

138

views

Matrix P to the power of 4, i.e $P^4$, is this the same as $P^2 \cdot P^2$?

linear-algebra matrices

dec 24 at 22:59 alex.jordan 8,814

3

votes

1

answer

90

views

Different form of determinant, does it make mine wrong?

homework linear-algebra determinant

may 4 at 22:10 bluemoon 100

3

votes

1

answer

35

views

What does it mean for the determnant of a matrix to be independent of the vector space

linear-algebra definition

apr 21 at 15:37 Mud 163

3

votes

0

answers

42

views

Use the ring ${\bf{O}}[\sqrt5]$ to show that $2$ is irreducible in $\mathbb{Z}[\sqrt5]$

homework abstract-algebra number-theory

apr 19 at 19:19 YACP 9,140

1

3

votes

1

answer

78

views

Using Fermats Little Theorem to show $2^{17} -1$ is prime

elementary-number-theory prime-numbers modular-arithmetic

apr 19 at 11:29 Hagen von Eitzen 42.4k

3

votes

4

answers

106

views

Solve $\frac{1}{2x}+\frac{1}{2}\left(\frac{1}{2x}+\cdots\right)$

algebra-precalculus summation

apr 3 at 1:25 Fly by Night 6,014

3

votes

4

answers

124

views

Where have I made my mistake in my integrating $\int x \sqrt{2x - 1} dx$?

algebra-precalculus integral

mar 28 at 23:26 amWhy 54.7k

1

3

votes

2

answers

74

views

If $(\pm x)^2 = X$ then $\sqrt{X} = x$?

algebra-precalculus

mar 27 at 16:52 Kaish 1,675

1

3

votes

1

answer

39

views

Find point $X$ such that line through plane $E$ and sphere $S$ meet at $(0,0,1)$ (stereographic projection)

homework linear-algebra differential-geometry

feb 23 at 21:31 adam W 3,180

2

3

votes

4

answers

176

views

Show that every integer can be written in the form $5a + 7b$ for $a,b \in \mathbb{Z}$

homework number-theory

feb 5 at 23:38 Brian M. Scott 154k

3

votes

3

answers

134

views

Is there a way to get all the permutations of $S_4$

group-theory permutations determinant

feb 2 at 20:13 Michael Hardy 48.1k

3

votes

1

answer

631

views

How to make two vectors orthogonal?

linear-algebra

jan 11 at 23:08 dr jimbob 533

1

3

votes

4

answers

125

views

What's the quickest way to solve $3^i \equiv 1 \mod 28$

elementary-number-theory

jan 11 at 8:17 lab bhattacharjee 28.6k

3

votes

0

answers

149

views

Prove that the set Aut(G) of all automorphisms of the group G with the operation of taking the composition is a group

group-theory proof-writing

dec 30 at 16:35 Kaish 1,675

3

votes

2

answers

176

views

Number of elements of given order in a group

group-theory finite-groups

dec 29 at 15:11 amWhy 54.7k

3

votes

4

answers

148

views

Integrating $\int_0^{\infty} u^n e^{-u} du $

integral gamma-function

dec 23 at 22:02 Ian Mateus 1,586

Kaish

170 Questions