fretty

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location Sheffield, United Kingdom
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Hey, I am currently a PhD student at the University of Sheffield. My interests are in algebraic number theory and related fields.

Check out my academia page for some of my papers/talks. I welcome any suggestions on how to improve them.

(http://sheffield.academia.edu/DanielFretwell)


140 Answers

newest activity votes
11
Number of integer solutions of $\frac{1}{x} + \frac{1}{y} = \frac{1}{1000}$
9
Elementary results from Algebraic Number Theory
7
trace of the matrix $I + M + M^2$ is
7
How are mathematicians taught to write with such an expository style?
6
Why is it legit to evaluate $\lim_{x\rightarrow 1} \frac{(x-1)(x+1)}{x-1}$ by cancelling common factors?
6
Puzzle: concatenation is three times product
6
How to find $x$ if $ x^5 \equiv 7 \pmod {13} $
6
Calculate integral of $ \int\sin^2(mx) \,dx$.
5
A matrix and its transpose have the same set of eigenvalues
5
Can all primes be written as a Mersenne prime?
5
Factor $4x^3-8x^2-25x+50$ completely
5
For any $n \geq 1$, prove that there exists a prime $p$ with at least n of its digits equal to $0$
5
How to find large prime factors without using computer?
5
What is the total number of combinations of 5 items together when there are no duplicates?
5
What remains in student's mind
5
$p$ an prime number of the form $p=2^m+1$. Prove: if $(\frac{a}{p})=-1$ so $a$ is a primitive root modulo $p$
5
Number of elements of a finite field
5
How can I evaluate an expression like $\sin(3\pi/2)$ on a calculator and get an answer in terms of $\pi$?
4
If $A\cup B=B$, does it follows that $A \subseteq B$?
4
Proving that $2^{2^n} + 5$ is always composite by working modulo 3
4
Notation for powers of trigonometric functions
4
Number of $4 $ digit numbers with no repeated digit.
4
Solving a quadratic Inequality
4
Real life application of Gaussian Elimination
4
Fibonacci's final digits cycle every 60 numbers
3
Find $a,b,c \in \mathbb {Q}$
3
question on Galois theory
3
Proving $\sqrt{2}\in\mathbb{Q_7}$?
3
Proving that if $A^n = 0$, then $I - A$ is invertible and $(I - A)^{-1} = I + A + \cdots + A^{n-1}$
3
Prove that if G is an abelian group then the conjugation equivalence relation is the identity relation ($x$ $\thicksim$ $y$ if and only if x=y).
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