Z particle
mass of, 1046
and number of neutrinos, 1047

Z transforms
and spectra of substitution systems, 1081

Zebras
correlation of two sides of, 1014
pigmentation patterns of, 426
stripes as camouflage for, 1012
stripes on as discrete, 337

Zeckendorff representation, 892, 1070

Zener diodes
as source of randomness, 970

Zeno's paradox
and discrete space, 1027

Zermelo, Ernst F. F. (Germany, 1871–1953)
and set theory, 1154

Zermelo–Fraenkel set theory, 1154

Zero equivalence
undecidability of, 1138

Zero-point fluctuations, 1062
and model of electron, 1044
and notion of ether, 1042
and uniform spectra, 988

Zeros
of sine functions, 917
of zeta function, 918

Zeta (Riemann zeta function), 148, 909
and density of relative primes, 1093
difficulty of evaluating, 1134
and distribution of primes, 909
and Feynman diagrams, 1060
from rational integrals, 916
as special function, 1092

Zeta functions
for periodic points, 959

ZF (Zermelo–Fraenkel set theory), 1154

ZFC (standard set theory), 1154

Zhabotinsky, Anatol M. (Russia/USA, 1938–[2008])
and oscillatory chemical reactions, 1013

Ziggurats
rules for building, 874

Zipf, George K. (USA, 1902–1950)
and Zipf's law, 1014

Zipf's law, 1014

Zippers
characteristic shapes of, 1183

Ziv, Jacob (Israel, 1931– )
and data compression, 1069

Zuse, Konrad (Germany, 1910–1995)
and universe as CA, 1026

Zygmund series, 918