id: 06474547
dt: j
an: 2015e.00657
au: Stephenson, Paul
ti: Primes by paper-folding. The symmetry of the Stechkin-Matiyasevich sieve.
so: Math. Sch. (Leicester) 44, No. 3, 40-41 (2015).
py: 2015
pu: Mathematical Association (MA), Leicester
la: EN
cc: G70 F60
ut: parabolas; analytic geometry; coordinate geometry; coordinates; grid
points; prime numbers; equations of straight lines; locus; symmetry;
collinearity; similar triangles; paper folding
ci:
li:
ab: From the text: In the piece â€˜Primes by Searchlightâ€™, directed at KS3
children, I mention work suitable for the sixth form. This is it. First
I describe the paper-folding construction, then unpick it to reveal the
similar right triangles and simple coordinate geometry hidden within
the figure it is derived from, a construction which sieves composites
from the natural numbers to leave primes first described by two
Russians, Boris Stechkin and Yuri Matiyasevich.
rv: