27,811 reputation
3168
bio website ncssm.edu/~morrison
location Chapel Hill, NC
age 25
visits member for 4 years, 2 months
seen yesterday

I am the chief wizard of computing at http://www.ncssm.edu

I am old enough to drink Champagne and Barolo.


2d
comment How to prove that the integral of a positive, continuous function is positive?
This is very likely a duplicate.
Jan
26
reviewed Leave Open Is there a formalism for a universal mathematical representation of algorithms?
Jan
26
reviewed Close Prove that if $y>1$, then $\forall M\in\mathbb{R}$, there exists an $N$ in the natural numbers s.t. $n\geq N$ implies $y^n>M$.
Jan
26
reviewed Leave Open Find the coefficient of $x^{4}$ from $(1+x)^{1/3}$
Jan
26
comment Find the coefficient of $x^{4}$ from $(1+x)^{1/3}$
This can also be done with a truncated Taylor expansion.
Jan
26
reviewed Close A 57“ arm has a vertical pin at one end, if the pin angle changes by .020” how much does the other end of the arm move?
Jan
23
reviewed Reviewed computing interpolating polynomials of 5 equally spaced points in a given interval
Jan
23
reviewed Leave Open Can anyone help me solve this problem about linear programming?
Jan
21
answered Proving an Identity with Scalar Product
Jan
21
answered Is zero an even number?
Jan
20
answered Absolute continuity of $F=\int_{[0,x]\times [0,x]} f$.
Jan
19
answered Prove that $\|u + v\| = \|u - v\|$ if and only if u and v are orthogonal.
Jan
19
comment If $\|Df\|<M$ in a disk, then $M$ is a Lipschitz constant
A closed ball is convex. You can use a straight-line path.
Jan
17
reviewed Close find a function satisfying the recurrence
Jan
17
reviewed Close Verify that the unbounded function belongs to $W^{1,n}$
Jan
17
reviewed Leave Open Are there any other functions that are always discontinuous?
Jan
17
comment Are there any other functions that are always discontinuous?
You are walking through the valley of real powers of negative numbers. There are complex dangers lurking here. Do not trust your calculator.
Jan
17
reviewed Leave Open $R$ has just one prime ideal iff $R/N(R)$ is a field
Jan
17
reviewed Close Boolean algebra Simplification of “xy + x'z + yz”
Jan
17
reviewed Leave Open Find an element of order $45$ in the group $\mathbb{Z}_{30}\oplus\mathbb{Z}_{12}$, or explain why it is impossible