Time neither subtracts nor divides, but adds at such a pace it seems like multiplication.
- Bob Talbert
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Over at Cosmic Variance, Julianne waxes rhapsodic about her calculator, a HP-15C. This is such an obvious Dorky Poll topic that I can't believe I didn't think of it earlier:
What sort of calculator do you use?
My students, particularly the future engineers, are always shocked by my answer:
I use a…
Some of the commenters to yesterday's post raised some interesting questions on the subject of dividing by zero. So interesting, in fact, that I felt the subject deserved another post.
My SciBling, revere, of Effect Measure: writes the following:
OK, I shouldn't jump in here because I'm an…
In my last math post I casually mentioned that the sum of the reciprocals of the primes diverges. That is
\[
\frac{1}{2}+\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+\frac{1}{11}+\frac{1}{13}+ \dots=\infty
\]
That seems like a hard thing to prove. Certainly none of the traditional convergence tests…
When I first talked about rings, I said that a ring is an algebraic
abstraction that, in a very loose way, describes the basic nature of integers. A ring is a full abelian group with respect to addition - because the integers
are an abelian group with respect to addition. Rings add multiplication…