38,816 reputation
359140
bio website davidlowryduda.com
location Providence, RI
age 26
visits member for 3 years, 6 months
seen 1 hour 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).


19h
answered Simple Eigenvalue finding question (by gauss elimination)
19h
comment Subspace vector proofs problem
That's too bad. Perhaps if you write down what you've tried, what you're trying to show exactly, and where you've gotten stuck, then someone will help you.
19h
answered $\int_{0}^{\infty} x \cdot \cos(x^3) dx$ convergence
19h
answered Proving that polynomials with rational coefficients have integer roots
1d
comment Equivalent definitions of the trace of a Hilbert-Schmidt operator
@T.A.E. Let us suppose that $K$ is smooth and bounded, very reasonable assumptions I think.
1d
revised Equivalent definitions of the trace of a Hilbert-Schmidt operator
added 43 characters in body
1d
comment Equivalent definitions of the trace of a Hilbert-Schmidt operator
@T.A.E.: That is a great question. It feels like we can define $K$ however we like on a set of measure zero. I can add that to my list of unanswered concerns over this definition of trace.
1d
answered Gaussian sums values
1d
asked Equivalent definitions of the trace of a Hilbert-Schmidt operator
2d
answered Rudin's Chapter 3: Numerical sequences and series
Oct
19
comment What's the Fibonacci number sequence? In other words, which pattern do Fibonacci numbers have? In other words again, what are their properties?
This is a very poorly motivated question. If you are not willing to look at google or wikipedia, then you cannot expect users here to spend time composing an answer.
Oct
19
comment If $f(x)$ has a minimum at $x_1$ and a maximum at $x_2$, which of the following are true?
@Pedro: At your request, I have updated it so that it's more true. Perhaps it now obscures the underlying idea, but you were right.
Oct
19
revised If $f(x)$ has a minimum at $x_1$ and a maximum at $x_2$, which of the following are true?
deleted 6 characters in body
Oct
19
answered If $f(x)$ has a minimum at $x_1$ and a maximum at $x_2$, which of the following are true?
Oct
19
revised If $f(x)$ has a minimum at $x_1$ and a maximum at $x_2$, which of the following are true?
deleted 5 characters in body; edited title
Oct
19
reviewed Approve suggested edit on If $f(x)$ has a minimum at $x_1$ and a maximum at $x_2$, which of the following are true?
Oct
18
comment Connected subsets problem
If Sigur is right, then this is false.
Oct
18
comment Connected subsets problem
What does A c B c C mean?
Oct
16
revised Two ships leaving a port at different times and different speeds. When do they meet?
added 1 character in body; edited tags; edited title
Oct
16
comment Calculate the integral of …
@Ken: You could just factor it out. This would lead you to $3\sqrt{1 - (u/3)^2}$, and you could go from there.