User mdave16 - Mathematics Stack Exchange

5 votes

Accepted

Solving a determinant equation. Solve for $x$.

answered Mar 29, 2017 at 22:42

5 votes

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Matrix Multiplication $\to$ Function Composition?

answered Aug 19, 2017 at 0:16

4 votes

(Quickly) finding the smallest fraction

answered Jul 26, 2017 at 0:48

3 votes

Finding the number of relations, mappings and permutations of a finite set

answered Nov 13, 2017 at 22:57

3 votes

Accepted

Critical polynomial roots bigger than 2

answered Mar 28, 2017 at 2:11

3 votes

Amount of even zeros in a 0,1 alphabet n length word

answered Jan 12, 2017 at 17:24

2 votes

An unanswered question is whether there are infinitely many primes that are 1 more than a power of 2

answered Dec 29, 2014 at 1:13

2 votes

Julia sets of quadratic functions

answered Mar 27, 2017 at 23:31

2 votes

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How many homomorphisms and isomorphisms

answered Jul 11, 2017 at 22:45

1 vote

Prove or disprove: There exist real numbers $x$ and $y$ so that $x - y$ is rational and $x + y$ is irrational.

answered Oct 2, 2020 at 17:25

1 vote

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Prove that $\sum_{i = n - b}^{a - m} {a - i \choose m}{b + i \choose n} = {a + b + 1 \choose m + n + 1}$

answered Oct 7, 2017 at 22:45

1 vote

Alternate form of $c\cdot \cos(a+b)$, with $c$ inside the $\cos$?

answered Oct 13, 2017 at 10:53

1 vote

Isometry and its inverse

answered Mar 26, 2017 at 12:03

1 vote

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To prove that if B is minimal spanning set implies B is maximal L.I

answered Aug 3, 2016 at 15:30

1 vote

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Trying to figure out number of permutations based on some rules

answered Jan 12, 2017 at 16:51

1 vote

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Critical points go to critical points under automorphism

answered Mar 20, 2017 at 10:03

1 vote

Linear transformation and its matrix

answered Mar 27, 2017 at 23:41

1 vote

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Let $[a, b]\subset\Bbb{R}$ and let $c \in[a,b]$. Prove that there exists a sequence of rational numbers $(r_n)$ such that $\lim_{n\to\infty}r_n=c$

answered Mar 28, 2017 at 21:16

1 vote

Proving equality of two functions

answered May 13, 2017 at 1:10

1 vote

The number, up to isomorphism, of abelian groups of order 40 is

answered Oct 19, 2017 at 2:01

1 vote

Finding the zeros of trigonometric polynomials.

answered Dec 29, 2014 at 1:07

1 vote

Accepted

On equivalent definitions

answered Jun 18, 2017 at 17:45

0 votes

How many different ways are possible to arrange 2 girls and three boys on a bench of five, so that at least 2 boys will seat next to each other?

answered Jun 15, 2017 at 22:31

0 votes

Algebra & vector questions. please help!

answered Apr 1, 2017 at 11:52

0 votes

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Find a recurrence relation for the amount of money

answered Apr 16, 2017 at 0:44

0 votes

Linear Control Systems

answered Mar 26, 2017 at 14:02

0 votes

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Linear transformation. Prove the statement or give an example in which it is false.

answered Mar 26, 2017 at 22:27

0 votes

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Product of Ideals in Ring that is not UFD

answered Mar 20, 2017 at 22:08

0 votes

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What is the best way to solve a system of linear equations that have the same constant term of 1

answered Oct 19, 2017 at 0:08

0 votes

Proving $(A\wedge B) \vee (\neg A\wedge \neg B)$ from $A\leftrightarrow B$

answered Oct 22, 2017 at 23:13

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32 Answers

Solving a determinant equation. Solve for $x$.

Matrix Multiplication $\to$ Function Composition?

(Quickly) finding the smallest fraction

Finding the number of relations, mappings and permutations of a finite set

Critical polynomial roots bigger than 2

Amount of even zeros in a 0,1 alphabet n length word

An unanswered question is whether there are infinitely many primes that are 1 more than a power of 2

Julia sets of quadratic functions

How many homomorphisms and isomorphisms

Prove or disprove: There exist real numbers $x$ and $y$ so that $x - y$ is rational and $x + y$ is irrational.

Prove that $\sum_{i = n - b}^{a - m} {a - i \choose m}{b + i \choose n} = {a + b + 1 \choose m + n + 1}$

Alternate form of $c\cdot \cos(a+b)$, with $c$ inside the $\cos$?

Isometry and its inverse

To prove that if B is minimal spanning set implies B is maximal L.I

Trying to figure out number of permutations based on some rules

Critical points go to critical points under automorphism

Linear transformation and its matrix

Let $[a, b]\subset\Bbb{R}$ and let $c \in[a,b]$. Prove that there exists a sequence of rational numbers $(r_n)$ such that $\lim_{n\to\infty}r_n=c$

Proving equality of two functions

The number, up to isomorphism, of abelian groups of order 40 is

Finding the zeros of trigonometric polynomials.

On equivalent definitions

How many different ways are possible to arrange 2 girls and three boys on a bench of five, so that at least 2 boys will seat next to each other?

Algebra & vector questions. please help!

Find a recurrence relation for the amount of money

Linear Control Systems

Linear transformation. Prove the statement or give an example in which it is false.

Product of Ideals in Ring that is not UFD

What is the best way to solve a system of linear equations that have the same constant term of 1

Proving $(A\wedge B) \vee (\neg A\wedge \neg B)$ from $A\leftrightarrow B$