This is a continuation of my previous post.
If we assume that the Universe is infinite, stationary and evenly filled with stars, then the number of stars at distance about from Earth is proportional to , while intensity of light from them declines as . Hence contribution of stars at distance to the brightness [...]
Archive for January, 2009
Stretching yardstick II: Photometric Paradox
Posted in Uncategorized on January 31, 2009 | Leave a Comment »
Stretching yardstick
Posted in Uncategorized on January 31, 2009 | 3 Comments »
My call for childhood stories brought to me a fascinating letter from SS:
I am writing this message for “I need your stories” page on your blog.
Should be around 15.
Male.
Turkish (my native language) and English. In Turkey, a lot of teachers speak in Turkish but write in English.
I got my PhD in mathematics almost 2 years [...]
Failure to account for negative numbers in modelling
Posted in Uncategorized on January 10, 2009 | Leave a Comment »
From BBC:
The latest fall in interest rates, and its knock-on effect on mortgage rates, has raised the interesting possibility that some lenders may soon have to start paying interest to some of their mortgage customers.
These are the ones who, in the course of 2007 and even into last year, took out tracker deals that specified [...]
How can one equivalent statement be stronger than another?
Posted in Uncategorized on January 7, 2009 | 1 Comment »
A very enlightenning discussion at Tim Gowers’ blog.
Damn the Three Times Table
Posted in Uncategorized on January 1, 2009 | 5 Comments »
A personal document from a sufferer of discalculia, from website of The Dyscalculia and Dylexia Interest Group. Should be a compulsory reading for anyone who teaches or attempts to teach mathematics, at any level. A few fragments:
For as long as I can remember, numbers have not been my friend. Words are easy as there can be [...]
