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visits member for 3 years, 2 months
seen Oct 21 at 12:43

I'm old. I get confused. OK?


Oct
16
comment A 1,400 years old approximation to the sine function by Mahabhaskariya of Bhaskara I
Except that that formula requires performing fractional exponents, so arguably not simpler.
Oct
16
comment A 1,400 years old approximation to the sine function by Mahabhaskariya of Bhaskara I
Yeah, Indians cooked up some pretty good pi back in that era.
Oct
8
comment Do mathematicians, in the end, always agree?
@Bakuriu - I'd say it's completely not allmost.
Oct
3
comment Prove that a logarithm is irrational
Prove?? Heck, I've known they were irrational ever since Mr Jesse first talked about them!
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
@ReneSchipperus - I've never read anything "hard" on the topic, but I've seen several discussions of the genetic and environmental factors that influence the sex of the infant.
Oct
1
comment Google Interview Question about a town where if a couple has a girl born, they can't have more children…
I'm sure it can be shown that in "real life" sequential births from the same parents are not "independent". There are subtle effects that will tend to cause parents of girls to produce more girls and parents of boys to produce more boys. Also, the ratio is not exactly 1:1. So one must ask: Are we talking "real life" or an idealized/theoretical scenario?
Sep
24
awarded  Autobiographer
Aug
27
comment What is the average of no numbers?
Consider that the average of { 17539126 } is 17539126. And the average of { 17539126 , 2 } is 8769564. If the average of { } is considered to be zero, wouldn't you expect that to "pull down" the average of the lists of 1 and 2 elements?
Jul
26
comment What are some conceptualizations that work in mathematics but are not strictly true?
Mathematicians are really sexy.
Jul
2
awarded  Curious
May
26
comment Can the square root of a real number be negative?
It appears to me that a part of the "problem" here is that the square root operation is relatively unusual in that it denotes the solution to an equation, whereas the vast majority of mathematical operations (at least the more familiar ones) do not. It's perfectly legitimate/un-scary for an equation to have multiple solutions, but we do not normally expect operators such as monadic - to produce multiple contradictory values. Thus there is some cognitive dissonance with the square root operator.
Apr
4
comment How can a piece of A4 paper be folded in exactly three equal parts?
Fold it into quarters and then tear away 1/4.
Jan
12
revised Sum of averages vs average of sums
added 80 characters in body
Jan
11
answered Pedagogy: How to cure students of the “law of universal linearity”?
Sep
10
awarded  Famous Question
Nov
27
comment Dividing a range into major and minor divisions
I tried the scheme on for size and it works pretty well, thanks. It hadn't occurred to me that the number of variations was small enough to practically enumerate, and with this scheme certain "unpleasing" combos can be eliminated if desired, just by altering the table.
Nov
27
accepted Dividing a range into major and minor divisions
Nov
27
comment Dividing a range into major and minor divisions
I'll have to think about this one. I like the idea that, since everything is precomputed, it's inherently stable and testable.
Nov
27
asked Dividing a range into major and minor divisions
Nov
2
awarded  Notable Question