Mile of Pi - Numberphile
This video by Numberphile is uncharacteristically light on math but is still pretty cool to watch - they printed out a million digits of pi (which ended up being just over a mile of pi) and unravelled it on the landing strip of an airport in Denmark!
As we've written about before, mitochondria generate the energy required by our cells through respiration that involves using an "electrochemical gradient" as an energy store (a bit like pumping water up into a reservoir for energy storage to then harness it flowing down the gradient of a hill to turn a turbine), and produces free oxygen radicals as by-products (a bit like sparks when the engine is running hot). The fundamental importance of this machinery which not only delivers energy, but is
1295 = 5 x 7 x 37.1295 is 5555 in base 6 (A097252).1295 has the representation 64 - 1 (A123865 and A024062). It is a subperfect power (A045542).1295 is the sum of consecutive cubes (A217843).1295 is the difference of two positive fourth powers (A147857).Every run of digits of 1295 in base 4 has length 2 (A033002): 110033.Source: What's Special About This Number
Yesterday night, I realised I had about 30 versions of my “mother of all .bib” bib file, spread over directories and with broken links with the original mother file… (I mean, I always create bib files in new directories by a hard link, ln ~/mother.bib but they eventually end up with a life of their […]
What's in the list you keep (internally or physically) of things we still traditionally teach in our math courses that just feel "wrong" in 2014? Memorizing formulas is probably one of my least favorite things, and I know I have that in common with my students, so wherever and whenever possible! I like to teach them the concept on a pattern level or with strategies that have more than one