## Imaging Properties of Kinoform Fibonacci Lenses

- Vicente Ferrando, Arnau Calatayud, P. Andres, Roberto Torroba, W. D. Furlan, J. A. Monsoriu
- IEEE Photonics Journal
- 2014

@article{Redish1990ClosedFE, title={Closed form expressions for the iterated floor function}, author={K. A. Redish and William F. Smyth}, journal={Discrete Mathematics}, year={1990}, volume={91}, pages={317-321} }

- Published 1990 in Discrete Mathematics
DOI:10.1016/0012-365X(90)90240-I

Redish, K.A. and W.F. Smyth, Closed from expressions for the iterated floor function, Discrete Mathematics 91 (1991) 317-321. For positive integers k, r, and n 2 k + 1, the iterated floor function f_ is defined by f,,,(k + 1) = r; f*.,(n) = [&fk,,(n 111, n > k + 1. A special case (k = r = 3) of this function occurs as an upper bound on the number of 3-subsets, excluding tetrahedra, of an n-set (Turan’s problem). For certain values of k and r, this note establishes closed form expressions for fk… CONTINUE READING