This note provides explicit algebraic stabilizing formulas for elf's when c
ontrols are restricted to certain Minkowski balls in Euclidean space. Feedb
acks of this kind are known to exist by a theorem of Artstein, but the proo
f of Artstein's theorem is nonconstructive. The formulas are obtained from
a general feedback stabilization technique and are used to construct approx
imation solutions to some stabilization problems. (C) 2000 Elsevier Science
B.V. All rights reserved.