493 reputation
313
bio website cobaltduck.info
location Milford, OH
age 42
visits member for 3 years, 8 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.


Mar
7
comment What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)
Or, more generally, that the ultimate result of this digital summing is the same as the remainder when dividing by 9.
Jan
23
comment “How I wish I could calculate pi” analogs…
Citation needed?
Dec
31
comment How to answer a student objection to the use of “of” in pronouncing f(x)?
joriki "would have told the student to keep up the critical thinking." However Ben Crowell responds "it's time to grow up to a more mature intellectual level." Very interesting.
Aug
2
awarded  Yearling
Jul
8
answered Big List of Fun Math Books
Jun
22
comment Tuple definition
Have you checked the old stand-by for definitions? en.wikipedia.org/wiki/Tuple
Jan
18
answered Mathematical toys?
Nov
16
comment Functions over $R$ such that $f(xy) = f(x)f(y)$
There is a term for what you are asking about, 'totally multiplicative function': en.wikipedia.org/wiki/Completely_multiplicative_function
Oct
18
accepted Probability that Scouting ashes continue to circulate?
Oct
17
comment Probability that Scouting ashes continue to circulate?
So if I am understanding you, a fire may have on the order $10^{26}$ atoms of ash at the end, and I remove about $10^{24}$ atoms. If I model this as a binomial with $n = 10^{24}$ and $p = .01$, then my expected number of atoms from the original fire is $10^{22}$. After two fires, this goes down to $10^{20}$ and so on, until by fire number 12, my expected value goes below $10^{0}$. Makes sense, if my interpretation is correct?
Oct
17
awarded  Commentator
Oct
17
revised Probability that Scouting ashes continue to circulate?
adding clarification of Kolmogorov
Oct
17
comment Probability that Scouting ashes continue to circulate?
@Didier Piau: en.wikipedia.org/wiki/Kolmogorov_zero-one_law (edited question accordingly).
Oct
17
revised Probability that Scouting ashes continue to circulate?
clarifying one assumption
Oct
17
asked Probability that Scouting ashes continue to circulate?
Sep
27
answered How to calculate ratio of ppm (parts per million)?
Sep
25
accepted How to answer a student objection to the use of “of” in pronouncing f(x)?
Sep
24
awarded  Nice Question
Sep
23
comment How to answer a student objection to the use of “of” in pronouncing f(x)?
Andre: Perhaps this is why I no longer teach algebra, and am now a computer programmer! Greg: "When I make a word do a lot of work like that," said Humpty Dumpty, "I always pay it extra."
Sep
23
asked How to answer a student objection to the use of “of” in pronouncing f(x)?