13,960 reputation
1539
bio website mathsci.appstate.edu/~cookwj
location Boone, NC
age 34
visits member for 3 years, 4 months
seen 7 hours ago

Assist Prof. at Appalachian State University (in Western North Carolina)


2d
awarded  Nice Answer
Jan
28
comment How to estimate parameters of exponential functions?
You could make Wolfram Alpha do it for you. Here's the computation when $x=5$, $y=6$, and $z=7$: wolframalpha.com/input/…
Jan
22
answered Online Archive of Master Thesis
Jan
9
revised Number of solutions to 3-variable sums with restrictions
added 306 characters in body
Jan
9
answered Number of solutions to 3-variable sums with restrictions
Jan
8
comment Zero Partials imply Constant Function Theorem or Proof
@GPerez If the partials are zero, they are continuous (constant functions are continuous). Then continuous partials imply differentiability.
Jan
6
reviewed Reject Is it OK to evaluate improper integrals this way?
Jan
6
comment Why do ODEs that have solutions that have closed form solutions, *have* closed form solutions?
Sorry, but some questions don't have easy answers. :) Although the pursuit of the answer to your question has led to some super-awesome mathematics!
Jan
6
answered Why do ODEs that have solutions that have closed form solutions, *have* closed form solutions?
Jan
6
revised Doubts in the concept of infinity
added 2468 characters in body
Jan
5
comment There is no simple group of order $144$
Yes, for a Sylow $p$-subgroup, that a bijection. That would work (and would be more to the point!).
Jan
5
revised There is no simple group of order $144$
added 1131 characters in body
Jan
5
answered Doubts in the concept of infinity
Jan
5
answered There is no simple group of order $144$
Dec
29
revised Is there a symbol for integrating and setting $C=0$?
added 320 characters in body
Dec
29
comment Is there a symbol for integrating and setting $C=0$?
@fvel Yes, setting $C=0$ does yield a function after you have computed a particular antiderivative. Integrating using different techniques & different substitutions (as shown above) can yield different answers. So the "process" (1) Compute "the" indefinite integral (2) set $C=0$ is not a "well defined" process. Different choices made during the computation yield different answers (this is what is meant by "not well defined").
Dec
28
answered Is there a symbol for integrating and setting $C=0$?
Dec
28
comment How can I factor the polynomial $125x^3 + 216$?
Notice that $216=6^3$.
Dec
28
revised How can I factor the polynomial $125x^3 + 216$?
edited tags
Dec
28
reviewed Approve How can I factor the polynomial $125x^3 + 216$?