528 reputation
315
bio website cobaltduck.info
location Milford, OH
age 43
visits member for 4 years, 2 months
seen yesterday

A former math teacher for 10 years, converted to Software Engineering just a few years ago. Enjoy woodworking, kayaking, hiking, and geocaching.


Oct
3
comment Quick and painless definition of the set of real numbers
Can you use a (fantasy-world ideal with no restrictions such as the width of a graphite molecule) pencil to draw a line x centimeters long? If yes, then x is a real number.
Sep
10
awarded  Quorum
Sep
2
awarded  Critic
Sep
2
comment Taking Calculus in a few days and I still don't know how to factorize quadratics
First, you should be able to succeed in calculus even with some small gaps in your knowledge of algebra, so you need not be overly worried. Next, I assume you have have already spent many hours with speaking with your teacher, reading your textbook, doing your homework, possibly with friends or in a study group, looking up online resources, and maybe even trying your parents, all in an effort to learn this topic. Unfortunately, this community is not going to be able to add anything new to what you've already done.
May
24
comment Algebra: What allows us to do the same thing to both sides of an equation?
@symplectomorphic: I agree 100%. But if it gets a learner started and helps with the basics before moving on to more advanced topics, what's the harm?
May
23
answered Algebra: What allows us to do the same thing to both sides of an equation?
May
14
answered Gift advice: present for high school graduate interested in math
Apr
7
awarded  Notable Question
Mar
31
revised A Card game problem related to Markov chain
corrected a "bug" in the code and result
Mar
28
answered A Card game problem related to Markov chain
Mar
19
comment Aunt and Uncle's fuel oil tank dip stick problem
@user135539: Do you have any links or other specifics of this publication, and the issue that contained your husband's problem? I would love to read and learn more about this, especially if you can lead me to the fabled and elusive solution "using only plain arithmetic" I have heard rumors about.
Dec
9
answered Poems related to mathematics
Dec
4
revised Is there a term for any number that is $2^n$?
little bit of grammar changes
Oct
5
comment Why does my calculator show $2^{-329} = 0?$
Reminds me of this oldie but goodie: cs.bgu.ac.il/~omri/Humor/lightbulb.html (first item).
Sep
5
comment Why do you add +1 in counting test questions?
I first noticed this phenomenon in elementary school, where the baseball field's backstop had three sections of netting between four poles. I never knew this idea actually had a name, and was related to fences.
Aug
16
revised Is there a term for any number that is $2^n$?
Answering the objections of downvoters and commenters
Aug
15
comment Is there a term for any number that is $2^n$?
This post on SO makes use of the term: stackoverflow.com/questions/9259952/…, so I'm not the only one calling it as such. Very curious that this got four down votes but was the OP's accepted answer.
Aug
15
answered Is there a term for any number that is $2^n$?
Jul
26
comment Prove that the distance between a black and a white dot is one
One could exploit a technicality in that the question fails to define "one unit." Arbitrarily select one black point and one white point. Define the distance between these points to be one unit. QED.
Jul
20
comment Mathematical writing: why should we not use the phrase “we have that”?
If ever there was a case for being able to cross-list questions on multiple SEs, this is it. I think the English SE community would have as much to input about this as Math SE, and each would benefit from the other's insights.