37,985 reputation
356137
bio website davidlowryduda.com
location Providence, RI
age 25
visits member for 3 years, 5 months
seen 4 hours ago

I'm working on my Math PhD at Brown University. I've finished my second year, and now I pursue my interests in analytic number theory. In particular, I study automorphic forms under Dr. Jeff Hoffstein.

I happen to loosely update a math blog at davidlowryduda.com. I put a lot of MSE things on there too, though a lot of the material caters to whatever class I'm teaching at the time (this fall, calc I).


17h
awarded  Nice Answer
1d
answered Can we say “commutative ring = field”?
2d
reviewed Leave Closed Is there problem follow my definitions to define $\mathbb{R}$
2d
reviewed Leave Closed Coloring every point of $\mathbb R$
Sep
18
answered which algebraic number theory book with answers to selected questions for self-study?
Sep
18
answered Best self study book with answers to selected questions for analytic number theory?
Sep
18
comment what does the phrase “no zero divisors mod 13” mean?
If you google zero divisor, four of the first five results are great answers to this question. It's also likely that your book defines a zero divisor, and/or has it in its index.
Sep
18
answered replacing numbers to get final anser
Sep
18
comment replacing numbers to get final anser
What book did you get this from?
Sep
18
comment Vectors and Projection
For this and the future, would you mind formatting your posts a bit cleaner? In particular: Use full grammar, punctuation, capitalization, and spelling; and can you separate parts out so that it isn't a wall of text? For super bonus points, you can use mathjax to make it really appealing.
Sep
15
comment (Taylor's theorem) Proving that $\sin(x) = \sum\limits_{n=0}^{\infty}\dfrac{(-1)^{n}x^{2n+1}}{(2n+1)!}$
I wrote a blog post about this and related topics for my students a while ago.
Sep
14
awarded  Enlightened
Sep
14
awarded  Nice Answer
Sep
14
awarded  Nice Answer
Sep
11
comment If fg is surjective, then g is surjective.
Exercise 2 on page 17 of what? Did you copy straight from a homework or something?
Sep
11
awarded  Nice Answer
Sep
11
revised let G be a group of order pq,where p and q are primes. Show that any non-trivial subgroup of G is cyclic
rolled back to a previous revision
Sep
10
comment Find cubic equation using known points
It is not possible. In fact, such an $a$ will not always exist. If $c = y_2$, then is it true that you want $x_2 = 0$? If so, then it is possible to solve for $a$, and you can do it in the naive way: plug in $(x_1, y_1)$ since you know both $b$ and $c$, and solve for $a$.
Sep
10
comment Three Number Theory problems
I actually believe others are downvoting your question because there is almost no content here. People react badly when they get the feeling that users are trying to get others to do their homework for them, moreso when there is no honest attempt or effort.
Sep
10
answered Prove that a graph with $n$ vertices is connected if it has $(n^2 - 3n + 4)/2$ edges.