Notes from a math conference
May. 19th, 2013 06:51 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
tangaroaA cyclic number is one that repeats, like 1/7 = .142857142857... [EDIT: according to the Wiki, this is wrong.]
1/7 has partial remainders in [1..6]
If 1/n remainders in [1..(n-1)], 1/n is cyclic
2/7, 3/7 in same cycle
Cyc gen by 7, 17, 19, 23, 47, 59, 61, 97 [EDIT: These numbers look prime, though some are missing like 11 and 31.]
Native command queueing (NCQ) reorders requests for disk sectors
Steven Moore testing drives
Western Digital lied about a drive having NCQ
4-dimensions
Complex functions: 2 inputs -> 2 outputs
Traditionally 2 planes are used.
Domain Couples, Image Complex
Color in image mapped to domain ? and vice versa
Poincaré disk: x^2 + y^2 < 1
"Neutral Postulates"
Hyperbolic distance different from Euclidean
Inversions in the circles preserves Eu dist?
Archimedes, Inc. Kaiser's math divsion.
Breast cancer rate dropped 10% since 2000. why? Environmental? Hormone pepl. therapy?
Survival analysis.
Non-dimensional
Middle terms of binary primes left and right are 1, by definition.
Miller-Rabin test for primes.
A (+) B = min(A,B) x^2 (+) 1 (*) x (+) 4 = min(2x, x+1, 4)
A (*) B = sum(A,B)
